1. Introduction
This manual provides essential information for the safe and efficient use of your Varstrom 48V13Ah Shark Battery. Please read these instructions thoroughly before installation and operation to ensure optimal performance and longevity of your e-bike battery.
2. Safety Information
Always prioritize safety when handling and operating your e-bike battery. Failure to follow these safety guidelines may result in fire, electric shock, or injury.
- Use only the charger provided or a Varstrom-approved charger for your battery.
- Do not expose the battery to extreme temperatures, direct sunlight, or fire.
- Avoid short-circuiting the battery terminals.
- Do not immerse the battery in water. While water-resistant, it is not fully waterproof.
- Keep the battery out of reach of children and pets.
- If the battery is damaged, emits an unusual odor, or becomes excessively hot, discontinue use immediately and contact support.
- Do not attempt to disassemble or modify the battery pack.
3. Package Contents
Verify that all items are present in your package:

Image: Varstrom 48V13Ah Shark Battery package contents.
- 1x Varstrom 48V13Ah Shark Battery
- 1x Battery Fix Plate (Mounting Holder)
- 2x Rubber Spacers
- 4x Screws for mounting
- 1x Fast Charger (54.6V / 2A)
- 2x Keys for battery lock
- 1x User Manual
4. Specifications

Image: Varstrom 48V13Ah Shark Battery dimensions and key parameters.
| Feature | Detail |
|---|---|
| Battery Model | Shark Battery 48V 13Ah |
| Battery Cell Type | Grade A 18650 2600mAh |
| BMS Max Protection Current | 30A |
| USB Port | Yes (5V 1A output) |
| Weight (with holder) | 4.25 kg |
| Cycle Life | 1000+ cycles with ≥80% capacity retention |
| Energy | 624 Wh |
| Charger Output | 54.6V / 2A |
| Charge Time | 6-7 Hours |
| Recommended Controller Voltage | 48V |
| Max Charge Current | 54.6V |
| Max Constant Discharge Current | 30A |
| Dimensions (L x W x H) | 368mm (14.5") x 90mm (3.5") x 111mm (4.3") |
5. Setup and Installation
Follow these steps to install your Varstrom Shark Battery onto your e-bike frame.
Video: Unpacking and detailed display of the 48V ebike battery, including installation steps.

Image: Step-by-step installation guide for the Varstrom Ebike Battery.
- Mounting the Battery Holder: If replacing an old battery holder, remove it. Install the new battery holder onto your e-bike frame using the provided screws. Ensure it is securely fastened.
- Connecting the Wires: Connect the battery plug (XT60-Female discharge interface) from the battery holder to the e-bike controller plug. Ensure a firm connection. If your motor connector is not XT60 style, use the provided conversion cable if necessary.
- Inserting the Battery: Carefully slide the battery pack onto the installed holder until it clicks into place.
- Securing the Battery: Use the provided keys to lock the battery onto the holder. This prevents theft and accidental detachment.
- Initial Check: Turn on the battery power using the button on the battery pack and check the LED indicator. Then, turn on your e-bike's display to confirm power and functionality.
6. Operating Instructions
Familiarize yourself with the key features and operation of your Varstrom Shark Battery.
Video: Overview of the Varstrom Ebike Battery Kit, highlighting features and operation.

Image: Detailed view of battery features.
- Power On/Off: Locate the power button on the battery pack. Press it to turn the battery on or off. The LED indicator lights will illuminate when the battery is on.
- Battery Indication: The LED lights on the battery indicate the current charge level. Typically, 4 green lights mean 100%, 3 lights 75%, 2 lights 50%, and 1 light 25%.
- USB Charging Port: The battery includes a universal USB port (5V 1A output) for charging external devices like smartphones or speakers. Simply connect your device's USB cable to this port.
- Anti-Theft Lock: The integrated lock secures the battery to your e-bike frame, preventing unauthorized removal. Always ensure the battery is locked when leaving your e-bike unattended.
- Charging: Connect the charger to the XLR power connector on the battery and then to a power outlet. The charger's indicator light will show charging status (e.g., red for charging, green for fully charged). The suggested charging voltage for a 48V battery is 54.6V.
7. Maintenance
Proper maintenance ensures the longevity and performance of your Varstrom Shark Battery.
- Regular Charging: Charge the battery regularly, even if not in frequent use, to maintain its health. Avoid completely draining the battery.
- Storage: If storing the battery for an extended period, charge it to approximately 50-70% and store it in a cool, dry place away from direct sunlight and extreme temperatures. Recharge every 2-3 months.
- Cleaning: Wipe the battery exterior with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners. Ensure charging and discharge ports are clean and free of debris.
- Water Exposure: While the battery has a water-resistant casing, it is not designed for submersion. Avoid prolonged exposure to heavy rain or direct water jets.
- Temperature: Operate and store the battery within recommended temperature ranges (typically 0°C to 45°C for charging, -20°C to 60°C for discharge).
8. Troubleshooting
If you encounter issues with your Varstrom Shark Battery, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Battery not charging | Charger not connected properly, faulty charger, power outlet issue, battery turned off. | Ensure charger is securely connected to battery and wall outlet. Test outlet with another device. Verify battery is turned on. Try a different charger if available. |
| Battery not powering e-bike | Battery not turned on, loose connection, battery not locked correctly, low charge. | Confirm battery is turned on and has sufficient charge. Check all connections between battery and e-bike controller. Ensure battery is fully seated and locked in its holder. |
| Reduced e-bike range | Low tire pressure, heavy load, steep terrain, cold weather, battery degradation. | Check and maintain proper tire pressure. Reduce load if possible. Note that cold weather can temporarily reduce battery performance. Battery capacity naturally decreases over time. |
| Battery LED indicators not working | Battery off, internal fault. | Ensure the battery is turned on. If the issue persists, contact Varstrom customer support. |
9. Warranty and Support
Varstrom products are designed for quality and reliability. For warranty information, technical support, or any questions not covered in this manual, please contact Varstrom customer service through the retailer where you purchased the product or visit the official Varstrom website.
Please retain your proof of purchase for warranty claims.