2. Q: How Do I Do Maintain the Batteries? (See the Annex of Battery Maintenance) 6

FAQs for Ninebot-E

1 / 23 Contents

I. FAQs...... 6

1. Q: How long is the warranty period? (See content and period of warranty in P17 of the

Warranty Manual)...... 6

2. Q: How do I do maintain the batteries? (See the Annex of Battery Maintenance)...... 6

3. Q: What information should I provide for maintenance?...... 6

4. Q: What information should I provide for insurance?...... 7

5. Q: How do I buy a new battery?...... 7

6. Q: What does the battery maintenance policy include?...... 7

7. Q: What do I do if the vehicle swings from side to side because the wheels lack grip?...... 7

8. Q: If a fault occurs with the tire outside of the three-month warranty, how can

I get it fixed?...... 8

9. Q: Do I get compensation if I fall off due to a power failure?...... 8

10. Q: What is the product return and exchange process? (See Annex: Product Returns and

Exchange Process)...... 8

11. Q: How do I inflate the tires of my Ninebot?...... 9

12. Q: Why does my Ninebot lean backward?...... 9

13. Q: How do I enter assisted riding mode?...... 9

14. Q: How do I pair the remote control and vehicle?...... 10

15. Q: How do I calibrate my Ninebot?...... 10

16. Q: How do you deal with batteries that need replacing a second time?...... 10

17. Q: How do I remove the battery?...... 10

2 / 23 18. Q: What happens if the vehicle is idle for several months and the battery discharges too much?...... 11

19. Q: How do I deal with a broken pin on the socket of the charger?...... 11

20. Q: How do I clear the Bluetooth pairing code?...... 11

21. Q: What do I do if the customer requires an invoice upon payment?...... 11

22. Q: How can a customer buy a vehicle accessory?...... 12

23. Q: What is the repair process for vehicles purchased from Sundan?...... 12

24. Q: What is the repair process for vehicles that are gifts from the Canton Fair?...... 12

25. Q: Is there a label describing maintenance on the vehicle's battery?...... 12

26. Q: What happens if a customer loses the remote control?...... 12

27. Q: Can Deppon Logistics require the customer to use a carton plus wooden pallet to return a vehicle?...... 13

28. Q: Are vehicles sold through channel conflict eligible for free maintenance if they’re still in their warranty period?...... 13

29. Q: If a customer from A travels to B and purchases a vehicle in an authorized physical store in B, does the nationwide warrant apply in A?...... 13

30. Q: What is the difference between dealing with a battery's excessive discharge and alarm

36 or 37?...... 13

31. Q: Why do the lights on the pedals keep flashing when the new battery is installed? Is the charger light green when the battery’s charging?...... 14

32. Q: What do I do when the small wrench icon and an exclamation mark show on the display screen and the alarm beeps?...... 14

33. Q: Why doesn’t Bluetooth connect?...... 14

34. Q: What might cause the vehicle to not ride straight?...... 14

3 / 23 35. Q: What do I do if the machine won’t power off?...... 15

36. Q: What are the features of a battery with a new protection panel?...... 15

37. Q: In a two-wheeled vehicle, a saddlebag cannot be installed after the water cup holder is installed. How is this solved? A CPE is mentioned in the consultation manual: What’s it for and how do I install it?...... 15

38. Q: Is the seven-day no reason return policy available both in online and offline shops?...... 15

39. Q: How big is Ninebot's wheel hub? How big is it when it's loaded with a tire?...... 16

40. Q: What should be provided before issuing a VAT invoice?...... 16

41. Q: Why doesn’t the tire grip well?...... 16

42. Q: What do I do if a payment error occurs?...... 16

43. Q: How long is the extended warranty for the battery or after a paid repair?...... 16

44. Q: I cannot determine which side is the problem located. For safety, do I need to find the problem?...... 17

45. Q: What do I do if the key does not match the vehicle?...... 17

46. Q: After the vehicle is powered on, only the word "Ninebot" lights up – the lights on the pedals don’t come on, the display screen doesn’t display, and the vehicle cannot be powered off. Why?...... 17

47. Q: If one of the five lights on the pedal panel does not illuminate, can the vehicle be used normally?...... 17

48. Q: If the pedal panel cannot pop up, is the sensor working?...... 17

49. Q: Which vehicles have a one-year warranty?...... 18

50. Q: There's an abnormal noise during riding. What might be the cause?...... 18

51. Q: When riding a Ninebot-C, it’s difficult to turn the vehicle. What might be the cause?...... 18

4 / 23 52. Q: After the Ninebot is powered on and I step on the pedal slightly, the vehicle enter assisted riding mode or rotates automatically in the same place. Why?...... 19

53. Q: What is alarm 35?...... 19

54. Q: After riding for some time, why do the power button and the lock button fail?...... 19

55. Q: What should I do if the vehicle powers on and powers off automatically?...... 19

56. Q: What do I do if the vehicle cannot fully charge?...... 20

57. Q: What is the problem if I cannot power the vehicle on with the remote control?...... 20

58. Q: What is wrong when alarm 31 occurs?...... 20

59. Q: What do I do if an alarm 40 occurs?...... 21

60. Q: What do I do if alarms 36 or 37 occur?...... 21

II. Popular Science...... 22

III. How our vehicles work...... 23

1. Introduction...... 23

5 / 23 I. FAQs

1. Q: How long is the warranty period? (See content and period of warranty in P17 of the Warranty

Manual)

A: You are entitled to:

1) A one-year free limited warranty for the integral product.

2) A half-year warranty for the battery assembly, charger, and remote control.

3) A 90-day warranty for exterior plastic parts, the fender, wheels, the wheel hub and pedal pads.

4) Warranty services from Ninebot require a serial number, a warranty card, and an official invoice.

5) A two-year warranty applies if you have a warranty card from an early Ninebot product that specifies a two-year warranty.

2. Q: How do I do maintain the batteries? (See the Annex of Battery Maintenance)

Charge large-capacity lithium batteries early and often. If you won’t use the vehicle for several months, store the battery when it's fully charged and then charge it once a month. For longer periods, store the fully charged battery and vehicle separately, and charge the battery once every three to six months. If you store the vehicle when it’s not fully charged; e.g., at 50% capacity, it may discharge excessively within 15 days.

3. Q: What information should I provide for maintenance?

First we need to verify your identity – whether you're an end user or distributor, and whether the vehicle is a purchased vehicle or sample vehicle from the distributor. Provide the following information:

Name, telephone number, vehicle number, warranty card, and official invoice.

Note: If you cannot provide the warranty card, take a picture of the vehicle number on the bottom of the vehicle, charger port or back of the remote control, and send it to us by WeChat. If you cannot provide an official invoice, the system delivery time of distributors will be considered to be the warranty period, which can be extended by two months (for end users) or three months (for distributors) according to the delivery date. However, we need to check the repair record and

6 / 23 insurance to determine whether there are any unusual circumstances.

4. Q: What information should I provide for insurance?

Name, telephone number, vehicle number, purchase date, email address, and ID number.

5. Q: How do I buy a new battery?

Official website, agent, maintenance center

6. Q: What does the battery maintenance policy include?

A: The battery maintenance policy includes:

A six-month warranty during which time a battery can be replaced for free, including freight, if the damage is not attributable to the user. Between six months and nine months we provide an extended warranty service, provided for RMB

299 plus freight. Between nine months and two years we offer a paid-service at RMB 1,150 plus freight. Beyond two years, you need to buy a new battery, which costs RMB 3,398.

Note: If your vehicle is a Ninebot Black Forever, you will be provided with an extended warranty service at RMB 299 that applies between six and nine months. Beyond nine months, you will be offered a paid-service at RMB 1,150 if you provide an invoice. If you cannot provide an invoice, the warranty period for the first time can be extended by 60 days. If maintenance is within the warranty period, you can contact Forever's customer service directly.

7. Q: What do I do if the vehicle swings from side to side because the wheels lack grip?

First check if you have a flat tire. Then check whether the tire screws are loose, and tighten them if necessary. If the left tire's grip is poor, change both tires. If the left tire’s grip is still bad, there might be a problem with the vehicle, and you should return it to the factory. If the right tire's grip is poor, the tire might be faulty, and you should return the tire only to the factory. In warranty and for a product quality issue, the tire will be changed for free. After three months, you’ll need to pay for a new tire.

7 / 23 8. Q: If a fault occurs with the tire outside of the three-month warranty, how can I get it fixed?

If there’s only a problem with the inner tire, buy a new one (RMB 40) and pay for the installation work (RMB 60), i.e., RMB

100 in total. At present, inner tires can be repaired only in Tianjin and Jinan.

If there's a problem with the outer tire, you need to replace the tire and pay for the freight.

9. Q: Do I get compensation if I fall off due to a power failure?

① Seek medical treatment and keep all receipts and invoices for medical expenses and prescriptions. We will help set up an insurance plan if necessary.

② We will record the condition of the vehicle, including the remaining charge and vehicle status during the incident, the customer's weight and speed, and a detailed description of the accident.

③ We will ask the customer whether he/she is willing to return the vehicle to factory and whether he/she accepts our test results. If yes, we will return the vehicle. If no, we will suggest a third-party examination, and request the results.

10. Q: What is the product return and exchange process? (See Annex: Product Returns and

Exchange Process)

If a customer dials 400 for a return or exchange, we first record the maintenance details of the vehicle. The customer then needs to apply to the distributor directly. The distributor will contact us and fill out an application form, which includes conventional and unconventional scenarios:

① A conventional scenario refers to a fault within 7 or 15 days.

② An unconventional scenario refers to a fault that happens out of warranty.

11. Q: How do I inflate the tires of my Ninebot?

You need to assemble the tire. Remove the decorative cover to reveal three screws. Unscrew these and remove the tire

8 / 23 (with the nozzle on the inner side). The air pressure for inflation is 10pa ~ 15pa. A heavy weight indicates a high pressure inflation.

12. Q: Why does my Ninebot lean backward?

① If you ride too fast, the vehicle will give an alarm, and lean backwards when decelerating.

② The vehicle has a speed limit set. Check if there's a speed limit button on the display screen of the handle. If there is, press the speed limit button on the right side of the remote control to cancel it. Or lock the vehicle when it's on to see the speed limit displayed on the screen. Then you can press the left and right keys on the remote control to adjust the figure - the maximum speed is 20

③ The vehicle needs to be re-calibrated

④ The batteries are low.

13. Q: How do I enter assisted riding mode?

After the vehicle is powered on, lightly step on the pedal panel and you will hear a "beep", which indicates the vehicle has entered assisted riding mode. After you get off the vehicle, the Ninebot will switch mode from standing riding to assisted riding.

9 / 23 14. Q: How do I pair the remote control and vehicle?

If the vehicle number is higher than 1425, unscrew the screw on the right side of the charging port with a pin or the like, insert the key into the port, and short press the power button once. Don’t press the power button more than once, or it may affect power on. Long press is not necessary.

15. Q: How do I calibrate my Ninebot?

First balance the vehicle (preferably against a wall), start it, lock it with the single unit lock button, press the power button four times, and press the speed limit button for 3-5 seconds. One calibration may not be successful, so try a few times if necessary.

16. Q: How do you deal with batteries that need replacing a second time?

First, the customer needs to provide the battery's serial number - if it is a replacement and still within the warranty period, it will be dealt with as such. For a second battery failure that occurs within the extended warranty period or within two months after a paid-maintenance, it is regarded as within the warranty period and we will pay freight. The warranty period is six months for a new battery that cost RMB 3,398.

17. Q: How do I remove the battery?

The battery is at the bottom of the vehicle is fastened by three screws, which can be unscrewed by a hexagon socket wrench so that the battery can be removed.

10 / 23 18. Q: What happens if the vehicle is idle for several months and the battery discharges too much?

When this happens:

1) The charger indicator will illuminate when it’s plugged into the power supply at one end but not plugged into the vehicle at the other. The indicator will not illuminate when the other end of the charger is plugged into the vehicle, and the display screen on the handle will flash or not respond.

2) If there's no response under the conditions detailed in paragraph (1), charging will soon be displayed on the screen on the handle as normal, but the vehicle still cannot be powered on.

19. Q: How do I deal with a broken pin on the socket of the charger?

It can be used normally without affecting the normal charge.

20. Q: How do I clear the Bluetooth pairing code?

Press the right speed limit button on the remote control for about 10 seconds, during which the first "beep" indicates that speed limit is on, the second "beep" indicates that Bluetooth is on, and the third "beep" indicates that you can release the speed limit button.

21. Q: What do I do if the customer requires an invoice upon payment?

The customer must provide an invoice title and pay the mailing fee.

11 / 23 22. Q: How can a customer buy a vehicle accessory?

Accessories include sales accessories and maintenance accessories - sales accessories can be purchased through the official website, agents, and maintenance centers. Maintenance accessories are not available for private purchases and retail at the end-user price only.

23. Q: What is the repair process for vehicles purchased from Sundan?

It is the same as the domestic department process:

① The sample vehicles in Sundan are provided by the domestic salesman Li Wenhong, not purchased by Sundan;

② The warranty period applies. (Expenses must be settled with Ninebot's domestic department.)

24. Q: What is the repair process for vehicles that are gifts from the Canton Fair?

They will be dealt with within the normal warranty period without requiring any certificate or evidence.

25. Q: Is there a label describing maintenance on the vehicle's battery?

Warning labels have been attached to the battery since the N1UEA1512A0246 model, with one more screw bag each.

Warranty cards are post-return-for-repair and the specification books are C and E types, i.e., universal ones.

26. Q: What happens if a customer loses the remote control?

The customer will need to buy a new one from the maintenance center, and bring the vehicle and battery to the center for a new matched key, which needs to be reported for repair. The customer must deliver the vehicle to the after-sales service center, and pay for freight and the key's cost. If the vehicle’s serial number is later than N1UEX1425XXXXX, the customer can buy a remote control and match it themselves.

12 / 23 27. Q: Can Deppon Logistics require the customer to use a carton plus wooden pallet to return a vehicle?

Yes, and the customer would assume the wooden pallet fee.

28. Q: Are vehicles sold through channel conflict eligible for free maintenance if they’re still in their warranty period?

If it's confirmed to be a design flaw or quality issue, free warranty applies but the customer’s information must be provided.

29. Q: If a customer from A travels to B and purchases a vehicle in an authorized physical store in B, does the nationwide warrant apply in A?

Provided that the vehicle is within the warranty period, its serial numbers are the same, and there is a warranty manual and a formal invoice, the customer is eligible for the normal nationwide warranty service.

30. Q: What is the difference between dealing with a battery's excessive discharge and alarm 36 or

37?

A battery's excessive discharge is due to being unused for a long time instead of product quality issue; occasionally it will also result in alarm No. 36 or 37.

13 / 23 31. Q: Why do the lights on the pedals keep flashing when the new battery is installed? Is the charger light green when the battery’s charging?

1) Loose screws. Remove the battery, reinstall it, and tighten the screws.

2) When the charger indicator goes green light, the battery is fully charged. Be sure to monitor battery maintenance.

32. Q: What do I do when the small wrench icon and an exclamation mark show on the display screen and the alarm beeps?

This is a low battery alarm. Stop using the vehicle when the capacity reaches grid 2 or 3 under normal use, and charge the battery as soon as possible. The alarm will stop when the battery is fully charged.

33. Q: Why doesn’t Bluetooth connect?

1) Only android 4.3 and later can be connected; for IOS, only Apple 4S and above can be connected.

2) If your version is acceptable, then the Bluetooth module on the MPU in the vehicle might be faulty and need repairing.

Return the vehicle to be checked. Note: Ensure that the Bluetooth is on turned on in both the phone and vehicle when they’re connected.

34. Q: What might cause the vehicle to not ride straight?

1) Ask the customer to check whether the lower part of the handle and the steering mechanism is fixed properly. If not, reassemble the unit if necessary.

2) Check tire pressure in the tires and ensure consistency on both sides (the normal tire pressure is 15psi).

3) Calibration. If the above two problems don't apply, the vehicle may have lost balance - guide the customer to calibrate the vehicle. (Balance the vehicle, start it, lock it with the single unit lock button, press the power button four times, and press the speed limit button for between 3-5 seconds).

14 / 23 35. Q: What do I do if the machine won’t power off?

After removing the battery, re-configure the key. If the vehicle's serial number is later than N1UXX1425XXXXX, unscrew the small screw on the right side of the charging port and insert a suitably sized object to press the button. The red light flashes once, and then you can press the power button.

36. Q: What are the features of a battery with a new protection panel?

1) A battery with a new protection panel includes excessive discharge protection. If standby discharge occurs, the battery can discharge from every cell (alarm No. 36/37 is settled).

2) The current battery, Sacred Sun (SS), has excessive discharge protection, while RealForce (RF) batteries are mostly equipped with the old protection panel, which cannot discharge from every cell.

3) The new RF battery and new SS battery will be equipped with a new protection panel.

The CPE is a leather bag for remote control that’s installed at the connection between the upper and lower parts of the handle. Unscrew the lowest screw so that you can install the remote control leather bag.

38. Q: Is the seven-day no reason return policy available both in online and offline shops?

It only applies to the online platform. For offline shops, the seven-day return policy only applies to quality issues.

39. Q: How big is Ninebot's wheel hub? How big is it when it's loaded with a tire?

12-inches, and16 when a tire is installed.

15 / 23 40. Q: What should be provided before issuing a VAT invoice?

If the customer requires a VAT invoice, he/she must provide the copy of the following four documents concerning company information: 1. Opening Account License; 2. Tax Registration Certificate; 3. Business License; 4. Qualification Certificate for General Taxpayer.

41. Q: Why doesn’t the tire grip well?

Riding too fast on a bumpy road can deform the wheel hub. Explain to the customer that the vehicle is light and may not grip well on bumpy roads.

42. Q: What do I do if a payment error occurs?

If a payment error occurs and the customer requires a refund, fill out an OA sales expenses application form (maintenance fee are non-refundable).

43. Q: How long is the extended warranty for the battery or after a paid repair?

If a second battery failure occurs within the extended warranty period or within two months of a paid repair, it is regarded as within warranty and we will pay freight.

16 / 23 44. Q: I cannot determine which side is the problem located. For safety, do I need to find the problem?

Let the customer describe the vehicle's fault accurately, or send a small video of the vehicle to determine the fault. Ask the customer whether he/she is near to the shop where the vehicle is purchased. If yes, the customer can get the vehicle checked. If no, the customer needs to return the tire to the factory.

45. Q: What do I do if the key does not match the vehicle?

If the customer can perform matching, we can guide the customer to re-match the key. If the customer cannot, the warranty period for remote control - six months – applies. If the issue is a fault with the vehicle, the warranty applies.

1) Try to connect the phone app to the vehicle and update the firmware. If it isn’t solved, the MPU may be faulty.

47. Q: If one of the five lights on the pedal panel does not illuminate, can the vehicle be used normally?

This will not affect the normal riding of the vehicle – one light on the LED panel in the vehicle's interior mid-compartment that is not connecting well or damaged will not become a threat to the vehicle.

48. Q: If the pedal panel cannot pop up, is the sensor working?

1) In normal conditions, a sensor tone will sound if you step on the pedal with one foot before setting off. If it doesn’t, power off the vehicle and then and power it on again.

17 / 23 2) If a fault reoccurs after you power-off and power-on, the pedal switch may be faulty and you should return the vehicle to the factory.

49. Q: Which vehicles have a one-year warranty?

Ninebot vehicles now have a new Warranty Manual (the warranty period is 1 year) with a feedback page. Note this applies to vehicles with this serial number N1UEA1520A1197 and later.

50. Q: There's an abnormal noise during riding. What might be the cause?

1) Check whether the noise is coming from the left/right tire or inside the vehicle.

2) If it’s from the left or right tire, check whether the three screws in both tires are fixed tightly because a loose screw will make a noise from friction.

3) If the abnormal sound is produced from inside the vehicle, please send it for repairs and return the vehicle to the factory.

51. Q: When riding a Ninebot-C, it’s difficult to turn the vehicle. What might be the cause?

Low tire pressure on one side or the steering mechanism might be faulty.

Q: How do I remove the broken pin from the vehicle?

Place the vehicle on its side. Insert a household needle into the pinhole and gently remove the pin. You can also use tweezers or a pointed clip

Removing the pin (same level as the socket).

Dip the needle in 502 glue, insert it into the pinhole, wait 10 seconds, and slowly pull the pin out. (Use a fine needle!)

18 / 23 52. Q: After the Ninebot is powered on and I step on the pedal slightly, the vehicle enter assisted riding mode or rotates automatically in the same place. Why?

① Re-calibrate the vehicle to balance it.

② Check whether the pressure difference between the tires is too large.

③ The steering mechanism is faulty.

53. Q: What is alarm 35?

1) Update the program. (When alarm 35 is triggered, Bluetooth will come on automatically.)

2) If alarm 35 remains after the program updates, return the vehicle and the remote control to the maintenance center for checking.

54. Q: After riding for some time, why do the power button and the lock button fail?

1) The customer should match the key again, and we can instruct the customer how to do so.

2) If this fails, the customer needs to report the vehicle for repair and send it and the key to the factory for checking.

55. Q: What should I do if the vehicle powers on and powers off automatically?

If the serial number is later than N1UEX1425XXXXX, instruct the customer to unscrew the screw on the right side of the charging port and re-match the remote control. If the problem remains after re-matching the remote control, or, if the serial number of the vehicle is earlier than N1UEX1425XXXXX, the customer should report the vehicle for repair and send it to the factory for checking.

19 / 23 56. Q: What do I do if the vehicle cannot fully charge?

A: The charger or battery is usually the cause.

1) The firmware is out of date. Connect the vehicle to the app and update the firmware. Power off the vehicle and restart it, and check whether it can be fully charged.

2) If the problem remains after the firmware update, replace the charger and charge it again.

3) If the problem remains after replacing a charger that's in good condition, the battery may be faulty.

57. Q: What is the problem if I cannot power the vehicle on with the remote control?

① The remote control is out of power and needs to be replaced. If so, when you press a button on the remote control, the blue light won’t flash.

② If the remote control is fine but the vehicle cannot be powered on, it may have been idle for a long time and the battery may have discharged too much.

③ In rare cases, both the remote control and the vehicle are working properly but the vehicle won’t power on, in which case re-match the vehicle and remote control.

58. Q: What is wrong when alarm 31 occurs?

The DP9 pin that connects the lower part of the handle and the vehicle is broken. If the customer can remove the broken pin, they can send just the handle back. If not, the customer needs to send the handle and vehicle back. Faults within the one year warranty are subject to the warranty if the problem is not attributable to the user 1. Check the connection of the upper and lower parts of the handle, the connection of the lower part of the handle and the vehicle, and the pins located on three places of the charging port.

NOTE: Specifically, if it's within one year, but the number of broken pins is five (or more), it's subject to maintenance beyond the warranty period. If the customer can replace the pins themselves, we can send the customer a few DP9 pins but we won't pay postage.

59. Q: What do I do if an alarm 40 occurs?

20 / 23 Alarm 40 indicates that the rubber cover board is deformed and requires repairs at the factory. Send the vehicle and remote control back.

NOTE: Alarm 40 also occurs when the pedal panel is pressed before the vehicle is powered on or has not been powered on completely. In this case, restart the vehicle.

60. Q: What do I do if alarms 36 or 37 occur?

These alarms mostly indicate a battery fault, so the customer needs to report the vehicle for repairs and send the battery back to the maintenance center for checking. If the battery is working properly, we’ll ask the customer to send the vehicle for a check.

21 / 23 II. Popular Science

First of all, congratulations on becoming an aficionado of stylish transportation.

The electric self-balancing vehicle is a new trend that’s stylish, sporty, low-carbon, and green. Having entered the mainstream, it offers a new, convenient transport and entertainment mode. So, what is an electric self-balancing vehicle and how does it work?

Electric self-balancing vehicles come in two types: one-wheeled or two-wheeled. Both are based on Dynamic Stabilization.

Gyroscope and acceleration sensors detect changes in the vehicle's posture. A servo control system precisely drives the motor to adjust the vehicle to maintain its balance. As you tilt your body, you can control the vehicle's running speed and direction. It’s very easy to learn and easy to master.

The self-balancing vehicle helps combat the pollution problem, because it needs nothing more than human motion to move, uses clean energy, and is small enough to be ridden on crowded streets.

Ninebot self-balancing vehicles can be used outdoors, in exhibition halls, or in the workplace. The motor is no louder than opening a book, so noise pollution isn’t a worry.

The government advocates green travel by reducing the use of private cars to cut emissions and mitigate ecological disaster - we need to leave a green earth for the next generation.

Ninebot strives to become a global brand in the field of electric and smart transportation, so we strictly control every step in the manufacturing process to ensure quality, including the accessories we select.

Because our vehicles are mainly used on pavements, a smart protection chip mechanism limits speed by causing the pedal to tilt and an alarm to sound. We believe that safety trumps speed. Ninebot self-balancing vehicles also monitor tilt angle and remaining power in real time, and alarms sound if the threshold is reached to ensure safety.

The era of smart self-balancing vehicles is here. Green travel will soon no longer appeal to the minority – it will be a lifestyle choice for society. The day will come when the haze disappears. We hope you can ride with Ninebot and make the world better together.

Smart and green, we are the Ninebot self-balancing transport solution.

22 / 23 III. How our vehicles work

1. Introduction

Ninebot self-balancing vehicles apply the inverted pendulum principle.

For example, as kids we used to play game – hold a broom or stick on our palm, and keep it straight by moving it around.

Ninebot applies a similar principle, and the objects it holds are the vehicle and a person. The source of power is two motors. A gesture detection system exists as a three-axis gyroscope and a three-axis acceleration sensor, which are similar to gesture sensors on smart phones (e.g., on racing games).

The basic principle for Ninebot self-balancing vehicle to keep balanced is simple: When the vehicle detects the rider leaning forward, the control motor accelerates; leaning back causes it to decelerate. Steering is controlled through a differential rotation speed applied to the motors on both sides; for example, by turning one wheel forward and the other backward. Steering is controlled by the foot control lever. When a rider stands on the vehicle and changes the posture and angle of the vehicle by slightly leaning forward. The vehicle, in order to keep balance, will automatically accelerate forward. When the rider wants to brake, slightly lean the body backward, the vehicle will automatically decelerate. When the rider swings the foot control lever to the left with his/her knee or calf, the vehicle will turn in that direction.

Due to the maximum set speed, the controller gives an instruction to gradually tilt the vehicle backward when the maximum speed is reached to prevent the rider from accelerating indefinitely by leaning forward. This auto corrects the rider's posture so the vehicle maintains a certain speed.

To detect whether the rider is standing on the vehicle, the Ninebot self-balancing vehicle has two pedal switch sensors, one on each pedal, which is triggered when a person stands on the vehicle.

The Ninebot self-balancing vehicle also comes with a gravity sensor on its frame, which detects the driver's weight and whether the vehicle is being picked up.

23 / 23