1. Safety Instructions
1.1 Important Safety Warnings
WARNING:
- Read all instructions before using the product.
- Close supervision is necessary when the product is used near children.
- Do not put fingers or hands into the product.
- Do not use this product if the flexible power cord or output cable is frayed, has broken insulation, or any other signs of damage.
- This equipment is not intended to be used at ambient temperatures less than -20°C (-4°F) or above 40°C (104°F).
- The battery is intended to be charged when the ambient temperature is between 0°C (32°F) and 40°C (104°F). Never charge the battery when ambient temperatures are outside this range.
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE.
1.2 Rider Height Guide
There must be at least 1 inch (2.5 cm) of clearance between the top tube and the crotch of the intended rider while standing with one leg on each side of the bicycle. If there is less than 1 inch clearance, the bicycle is too large for the rider and should not be used.
1.3 Riding at Night
Riding at night requires extra caution. Cyclists can be hard to spot. Always choose appropriate clothing and equipment to reduce injury risk. Reflectors cannot replace required lights. Ensure you are visible with lights and reflective devices. Insufficient visibility can lead to serious injury or death.
1.4 Riding in Rainy Weather
Avoid cycling in wet weather; ride only when necessary. The electric bike is not suitable for heavy rain or deep water. Do not immerse the product in water or liquid, as the electrical system may be damaged.
- Be extra careful and slow down.
- Brake in advance, as stopping distances are longer.
- Enhance visibility with reflective clothing and approved lights.
- Be cautious of road hazards.
- Do not leave the e-bike out in the rain.
2. Product Overview
Familiarize yourself with the components of your iScooter EB3S electric bicycle.
2.1 Handlebar Components

The handlebar features:
- Display
- Brake Lever (Left)
- Headlight Switch
- Horn Switch
- USB Output Port
- Front Reflector
- Gear Shifter
- Brake Lever (Right)
2.2 Bicycle Components

Key components of the bicycle include:
- LED Headlight
- Suspension Fork
- Front Disc Brake Rotor
- Front Fender
- Battery
- Saddle
- Taillight
- Rear Fender
- Motor (Rear Hub)
- Rear Disc Brake Rotor
- Kickstand
- Pedal
3. Package Contents
Please check all items upon unboxing. If any parts are missing or damaged, contact support.

- E-bike Frame x1 (Partially Assembled)
- Front Wheel x1
- Quick-release Skewer x1
- Saddle x1
- Seat Post x1
- Front Reflector x1
- Front Fender x1
- Rear Fender x1
- Taillight x1 (Built-in Button Cell)
- Left Pedal x1, Right Pedal x1
- Charger x1
- Bike Pump x1
- Battery Key x2
- User Manual x1, Safety Instructions x1
Toolkit Contents: Various wrenches (16&18, 13&15, 12&14, 9&11 mm) and Allen keys.
4. Setup (Assembly)
4.1 Step 1: Install the Handlebar
- Loosen (DO NOT remove) the top and two side bolts on the steerer tube so the stem can rotate freely.
- Rotate the stem so that the handlebar clamp faces outward, aligning parallel to the frame and perpendicular to the suspension fork. Retighten the three bolts.
- Remove the four bolts and take off the handlebar clamp.
- Align the handlebar vertically, reattach the clamp, and tighten the four bolts in the order shown (e.g., diagonally) to secure the handlebar.
NOTE: After installing the handlebar, adjust the display, brake levers, and gear shifter to the desired angles, then tighten all screws and/or bolts.
4.2 Step 2: Install the Front Reflector
- Remove the screw on the front reflector bracket.
- Clamp the reflector onto the handlebar and retighten the screw, making sure it faces forward.
4.3 Step 3: Install the Headlight & Front Fender
- Remove the bolt and nut from the fork arch.
- Align the mounting holes of the fork arch, front fender, and headlight in that order (from inside to outside), then secure them with the bolts and nuts.
4.4 Step 4: Install the Front Wheel
- Remove the fork dropout protector. Keep it for future use.
- Pass the quick-release skewer through the front wheel axle.
- Sit the front fork dropouts onto the front wheel axle. Ensure the axle is seated properly in the dropouts.
- Tighten the acorn nut, then close the quick-release lever. WARNING: To ensure the wheel is tightly installed, the acorn nut must be tightened until the quick-release lever can be closed with resistance at the halfway-closed point.
4.5 Step 5: Install the Seat & Taillight & Rear Fender
- Open the quick-release lever on the seat post clamp.
- Loosen the saddle nut, attach the saddle to the seat post.
- Tighten the nut to secure the saddle and seat post.
- Loosen the taillight and rear fender nuts, then attach them to the seat post.
- Insert the seat post into the seat tube, adjust the saddle height and angle, and close the lever.
- Adjust the taillight and rear fender to the desired position and fully tighten their bolts.
WARNING:
- The seat post must be inserted past the minimum insertion mark.
- Ensure the seat post is tightened securely for safe riding.
- Remove the plastic film from the taillight, then press its button to turn it on or off.
4.6 Step 6: Install the Pedals
Screw the left pedal counterclockwise and the right pedal clockwise onto their crank arms, then tighten.
4.7 Step 7: Check Tire Pressure
After assembling the e-bike and before each ride, check the tires. If they feel soft or spongy, inflate them to the proper pressure.
5. Operating Instructions
5.1 Charging Instructions
Fully charge the battery before each ride.
Get to Know the Battery
- Battery Disconnect Switch: Press the 'I' side to power on the e-bike. Press the 'O' side to turn off the e-bike.
- Battery Keyhole: Locked (battery cannot be removed, key can be removed). Unlocked (battery can be removed, key can be removed).
- Battery Level Indicator & Switch: Press the button to check the battery level without powering on the e-bike (switch set to 'I'). More lights indicate a higher battery level.
To Charge the Battery
- Turn off the e-bike and open the charging port cover.
- Plug the charger into a wall outlet, then connect it to the battery's charging port.
- The indicator light is red while charging and turns green when fully charged.
- When charging is complete, unplug the charger from the outlet and the battery, then close the charging port cover.
Charging Guidelines:
- Store batteries in a cool, dry place away from direct sunlight and flammable materials.
- Use only manufacturer-approved chargers; charge in well-ventilated areas; unplug once fully charged; keep the charging port cover closed when not charging.
- Regularly inspect for damage; keep terminals clean and dry; do not attempt self-repairs.
- WARNING: If the battery overheats, leaks, emits an odor, or changes shape/color, discontinue use immediately.
5.2 Controls
- Power Button (M): Press and hold for 2 seconds to turn the e-bike on/off. When powered on, press to switch between ODO, TRIP, VOL, and T1.
- '+' Button: When powered on, press to increase the assist level by 1 (from 0 to 5).
- '-' Button: When powered on, press to decrease the assist level by 1 (from 5 to 0). Press and hold for 2 seconds to activate walk assist (bike moves at constant speed). Release to exit.
- Headlight Button: When powered on, press to turn the headlight on or off.
- Horn Button: Press to sound the horn.
- Gear Shifter: Lift to downshift. Press the Gear Increase button to upshift.
5.3 Assist Levels and Driving Modes

The EB3S offers five assist levels and corresponding driving modes:
| Assist Level | Driving Mode | Initial Speed |
|---|---|---|
| 0 | Off | 0 km/h |
| 1 | Mode 1 | 6 km/h |
| 2 | Mode 2 | 10 km/h |
| 3 | Mode 3 | 15 km/h |
| 4 | Mode 4 | 20 km/h |
| 5 | Mode 5 | 25 km/h |
When the speed limit is lifted, the maximum speed can reach 35 km/h.
5.4 Display

The smart LCD display screen provides real-time information:
- Headlight ON: Indicates the headlight is active.
- Assist Level: Shows the current pedal assist level.
- Battery Level: Displays the remaining battery charge.
- Riding Speed: Shows current speed in MPH or Km/h.
- Walk Assist: Indicates walk assist mode is active.
- E-bike Status: General operational status.
- App Connected: Shows if the e-bike is connected to the Voltix app.
- Riding Distance: Displays ODO (total distance), TRIP (trip distance), etc.
5.5 Settings
To enter settings mode, press and hold the '+' and '-' buttons simultaneously. Use the Power button to navigate and '+' / '-' to make selections.
- P01 (Unit): 00000: Metric Unit, 00001: Imperial Unit.
- P02 (Cruise Control): 00000: Disable, 00001: Enable.
- P03 (Screen Brightness): 00001: Lowest, 00002: Standard, 00003: Highest.
- P04 (Odometer Reset): After selecting 'P04', press and hold the '+' button for 4 seconds.
- P06 (Startup Mode): 00000: Gradual Start, 00001: Immediate Start.
To exit settings, wait 8 seconds or press and hold the '+' and '-' buttons simultaneously.
6. Maintenance
WARNING: Modifying or attempting to repair the e-bike system is strictly prohibited.
6.1 Accessories
Ensure all hardware is secured and all approved accessories are correctly connected. Check all hardware and accessories regularly. If you find any problems or are unsure, seek help from an experienced bicycle repairer.
6.2 Forks, Handlebar, Grips and Seat Adjustment
- Understand how your bicycle's forks work and adjust them appropriately for your weight and terrain.
- Ensure the handlebar and stem are aligned and tightened to the recommended torque value.
- Handlebar grips should not move easily. Replace damaged handlebars.
- Ensure the seat and seat post are correctly aligned and the seat post clamp is appropriately tightened, fully closed, and secured.
6.3 Brakes
Ensure that the brakes and their system components are undamaged, correctly fixed, and functioning properly. Neither the front nor the rear brake levers should touch the handlebars. If you find any issues with the brakes, take the bicycle to an experienced bicycle repairer for fixing.
6.4 Tires and Wheels
- Wheels should always rotate in a straight line. If they sway or bob, they need repair or replacement. An unstable wheel or loose spokes may affect normal use. It is recommended to have a bicycle repairman make all wheel adjustments and truing.
- Ensure tires and inner tubes are in good condition, with no visible damage, and that air pressure is stable. Replace punctured or cut tires and inner tubes. Riding with damaged or improperly inflated tires will decrease performance, increase wear, and make riding unsafe.
7. Troubleshooting
If any of the error codes listed below appear on the display, please contact support for assistance.
| Error Code | Description |
|---|---|
| E001 | Controller Fault |
| E002 | Communication Fault |
| E003 | Hall Sensor Fault |
| E005 | Brake Lever Fault |
| E006 | Motor Phase Loss Fault |
8. Specifications

| Feature | Specification |
|---|---|
| Model | EB3S |
| E-bike Weight | 24.8 kg (54.7 lbs) |
| E-bike Size (Unfolded) | 169 x 68 x 100 cm (66.5 x 26.8 x 39.4 in) |
| Max Load Capacity | 150 kg (330 lbs) |
| Recommended Age | 18 Years And Above |
| Motor Power | 250 W (Peak 350W) |
| Motor Type | Brushless |
| Battery Capacity | DC 36 V, 15 Ah Lithium battery |
| Charging Time | 7-8 h |
| Charger Input | AC 100-240 V, 50/60 Hz |
| Charger Output | DC 42 V, 2 A |
| Max Speed (Assist) | 25 km/h |
| Max Speed (Lifted) | 35 km/h |
| Range per Power | 60+ km (37+ miles)* (70-90km advertised) |
| Wheel Size | 26 x 1.95 inches |
| Frame Material | Aluminum alloy |
| Waterproof Rating | IPX4 |
| Certification | CE |
| Rated Passenger Capacity | One Seat |
| Storage Temperature | 20°C-25°C (68°F-77°F) |
| Operating Temperature | -20°C-40°C (-4°F-104°F) |
| Charging Temperature | 0°C-40°C (32°F-104°F) |
*About the range: Measured in a laboratory under 100% battery level condition. The range will differ depending on different factors, such as load, humidity, wind speed, and operation habits.
9. User Tips
- Always wear a helmet and appropriate safety gear when riding.
- Regularly check tire pressure before each ride to ensure optimal performance and safety.
- Fully charge the battery before long rides to maximize range.
- Familiarize yourself with local e-bike regulations and traffic laws.
- Perform routine maintenance checks on brakes, tires, and all moving parts to ensure they are in good working order.
- Keep the e-bike clean and store it in a dry place away from direct sunlight.
10. Warranty & Support
If you experience issues relating to assembly, riding, maintenance, safety, or errors/faults with your e-bike, please contact our support team.
Support Email: support@ebikelab.eu
Manufacturer: Dongguan Yicheng Shengda Information Technology Co., Ltd.
Manufacturer Address: Room 301, No. 28, Houshan Road, Nanchongkou, Humen Town, Dongguan City, Guangdong Province, China
Manufacturer E-mail: support@e-scootworld.com