1. Important Safety Instructions
⚠ Please mind potential fire risk and strictly follow the instruction manual for charging and storage. For disposal, please check your local authority's website for more information and dispose of the lithium-ion battery safely in accordance with the applicable legal requirements.
- Do not immerse the battery in water or seawater.
- Do not use or store the battery near heat sources (fire or heater).
- Do not reverse the positive and negative terminals.
- Do not connect the battery directly to wall outlets or car cigarette lighters.
- Do not connect the battery to an electrical outlet.
- Do not short-circuit the battery by directly connecting the positive and negative terminals with metal objects.
- Do not transport or store the battery together with metal objects such as necklaces, hairpins, etc.
- Do not strike, throw, or subject the battery to severe physical shock.
- Do not directly solder the battery.
- Do not pierce the battery with a nail or other sharp objects.
2. Package Contents
Verify that all items are present and in good condition upon unpacking.
- Varstrom E-Bike Battery (36V 13Ah)
- Mounting Plate
- Battery Charger (42V 2A)
- Keys (x2) for anti-theft lock
- User Manual
- Mounting Screws (x2)
- Battery Cover (Free gift, if included)
3. Specifications
| Feature | Specification |
|---|---|
| Brand Name | Varstrom |
| Voltage | 36V |
| Capacity | 13Ah |
| Energy | 468Wh |
| Cell Type | INR18650-26E-2600mAh |
| Cell Configuration | 10S5P (50PCS) |
| Max Continuous Discharge Current (BMS) | 30A |
| Overcurrent Protection Current | 90A |
| Charger | 42V 2A |
| Battery Base | 6PIN Gold-plated |
| Charging Port Type | DC2.1 |
| USB Plug | No |
| Type-C Interface | No |
| LED Indicator Board | 4 Green Light |
| Charging Temperature | 0-45℃ |
| Discharging Temperature | -15-65℃ |
| Charging Cut-off Voltage | 42V |
| Usage Cut-off Voltage | 28V |
| Battery Case Dimensions (L×W×H) | 368 x 90 x 89.5mm (14.4 x 3.54 x 3.52 inches) |
| Cycle Life | 1000+ cycles |
| Weight | About 3kg |
| Applicable Motor Power | 250W, 350W, 500W, 750W, 1000W, 1200W, 1500W |
| Certification | CE, RoHS |
4. Setup and Installation
The Varstrom E-Bike Battery is designed for easy installation on bicycle downtubes using standard bottle holder screws.
4.1 Installing the Mounting Plate
- Identify the downtube bottle cage mounts on your e-bike frame.
- Align the battery mounting plate with these mounts.
- Secure the mounting plate to the bike frame using the provided screws. Ensure it is firmly attached.
4.2 Installing the Battery
- Once the mounting plate is secure, slide the battery onto the plate.
- Ensure the battery clicks into place, indicating it is properly seated.
- Use the provided key to lock the battery to the mounting plate. This prevents theft and secures the battery during rides.
4.3 Electrical Connection
The battery features a 6-pin gold-plated discharge connector and an XT60-Female discharge interface for connecting to your bike controller.
- Connect the XT60-Female discharge interface from the battery to the corresponding XT60-Male connector on your e-bike's motor controller.
- Ensure all connections are secure before operating the e-bike.
5. Operation
5.1 Powering On/Off
The battery features a power switch for convenient control. Locate the power switch on the battery casing and press it to turn the battery on or off.
5.2 Power Indicator Light
The battery is equipped with a 4-green light LED indicator board to show the remaining power level.
| Number of Green Lights | Approximate Power Level |
|---|---|
| 4 Green Lights | 100% Power |
| 3 Green Lights | 75% Power |
| 2 Green Lights | 50% Power |
| 1 Green Light | 25% or Lower Power |
Press the button on the power indicator to check the battery level at any time.
6. Charging the Battery
The battery can be charged either on or off the bike.
- Ensure the battery is turned off before charging.
- Connect the charger to a standard wall outlet.
- Connect the charger's DC2.1 plug to the battery's charging port.
- The charger's indicator light will typically show red during charging and turn green when fully charged.
- Once fully charged, disconnect the charger from the battery and then from the wall outlet.
⚠ Use only the provided 42V 2A charger. Using an incompatible charger can damage the battery and pose a fire risk.
Charging Temperature: 0-45℃.
7. Maintenance and Storage
7.1 General Maintenance
- Keep the battery clean and dry. Wipe with a soft, damp cloth if necessary.
- Avoid exposing the battery to extreme temperatures, direct sunlight, or rain.
- Regularly check the battery and connectors for any signs of damage or corrosion.
7.2 Battery Management System (BMS)
The integrated BMS protects the battery from various issues, ensuring its longevity and safety. This includes protection against:
- Overcharge Protection
- Over-discharge Protection
- Overcurrent Protection
- Short Circuit Protection
- High Temperature Protection
- Over Voltage Protection
- Cell Voltage Balancing
7.3 Storage
- For long-term storage, charge the battery to approximately 50-60% capacity.
- Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures.
- If storing for extended periods, it is recommended to check the battery level every few months and recharge to 50-60% if necessary.
- Discharging Temperature: -15-65℃.
⚠ For disposal, please check your local authority's website for more information and dispose of the lithium-ion battery safely in accordance with the applicable legal requirements.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Battery not turning on | Battery is fully discharged; Power switch is off; Faulty connection. | Charge the battery; Ensure the power switch is in the 'ON' position; Check all connections to the e-bike. |
| Battery not charging | Charger not properly connected; Wall outlet not working; Faulty charger; Battery temperature too high/low. | Ensure charger is securely plugged into battery and outlet; Test outlet with another device; Try a different charger (if available and compatible); Move battery to a room temperature environment (0-45℃). |
| Reduced range or power | Battery not fully charged; Battery degradation over time; Extreme operating temperatures; High power consumption (e.g., steep hills, heavy load). | Ensure battery is fully charged before each ride; Battery capacity naturally decreases over many cycles; Operate within recommended temperature ranges; Adjust riding style to conserve power. |
| Battery overheating | Over-discharge; Overcharge; Internal fault. | Immediately disconnect the battery and allow it to cool down in a safe, open area. Do not use if overheating persists. Contact support. |
9. User Tips
- Regular Charging: For optimal battery health, avoid completely draining the battery frequently. Charge it regularly, even if only partially used.
- Temperature Awareness: Lithium-ion batteries perform best and last longest when operated and stored within their recommended temperature ranges. Avoid charging or discharging in extreme cold or heat.
- Secure Mounting: Always ensure the battery is securely locked to the bike frame before riding to prevent accidental detachment and potential damage.
- Charger Care: Keep the charger in good condition and avoid bending or damaging the cable. A damaged charger can be a safety hazard.
10. Warranty and Support
The Varstrom E-Bike Battery comes with a 2-year warranty.
- Warranty Period: 2 Years from the date of purchase.
- Maintain Point: Poland / France.
- Contact Support: For any warranty claims, technical support, or service inquiries, please contact your retailer or the Varstrom customer service.
⚠ Please retain your proof of purchase for warranty purposes.