VARUN Li-ion Ebike Battery User Manual

1. Introduction

Thank you for choosing our VARUN Li-ion Ebike Battery. This manual provides essential information for the proper use, maintenance, and storage of your battery. Please read it carefully to ensure safe and optimal performance.

For a more detailed user manual, please refer to the official PDF document: VARUN Ebike Battery User Manual (PDF)

2. Safety Warnings

Failure to follow these safety instructions may result in fire, electric shock, injury, or damage to the battery or other property.

• Do not short circuit the positive (+) and negative (-) terminals of the battery.
• Do not expose the battery to extreme temperatures, such as excessive heat, direct sunshine, close proximity to fire, or cold environments.
• Do not immerse the battery in water, salt water, acidic, or alkaline liquids, and avoid exposure to rain.
• Disassembling or modifying the battery case will void the warranty and can be dangerous.
• Store the battery in a shady, cool, and dry condition when not in use.
• If the battery is not used for an extended period, charge it for a minimum of 2 hours every 3 months.
• Only use the licensed and matching charger specifically designed for this battery.
• Please be aware of potential fire risks and strictly follow this 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 applicable legal requirements.
• Do not handle or store the battery with metallic objects like necklaces, coins, or hairpins, as this can cause short circuits.
• Do not reverse the polarity of the battery pack for any reason.

3. Package Contents

Please check the package for the following items:

• 1 x VARUN Li-ion Ebike Battery
• 1 x Free Charger

Image: Various VARUN Ebike Battery models and included charger.

4. Setup

1. Initial Battery Check: Before installation, verify that the positive (+) and negative (-) terminals of your new battery match the positions required by your ebike system.

   

   Image: Ebike battery with mounting rail for installation.

2. Wiring Connection: Connect the battery wires separately and ensure they are properly insulated to prevent short circuits. Double-check that both wires are well insulated after connection.

3. Optional External Discharger Plug: The default discharger plug is XT-60. If you require a different type of discharge plug, please specify your preference when ordering.

   

   Image: Various optional external discharger plug types including T-plug, Big Anderson, IEC plug, Small Bullet, Anderson, XT60, XT90, and Big Bullet.

5. Operation

5.1. Charging the Battery

1. Upon receiving the battery, it is recommended to charge it before its first use, as it is shipped at a low voltage for safety.
2. To charge, first plug the AC end of the charger into a wall outlet, then connect the charger's output connector to the battery's charge port.
3. The charger's LED indicator will turn red, indicating that the battery is charging.
4. Once the battery is fully charged, the charger's LED indicator will turn green. Disconnect the charger by first unplugging the AC end from the wall, then disconnecting the charger connector from the battery.
5. If the battery will not be used immediately after receipt, charge it for approximately 2 hours before storing it. Fully charge it before its first use.
6. Ensure the charging temperature is between 0°C and 45°C. Charging below 0°C is not recommended.
7. Some 4A or larger chargers may require adjustment to 110V or 220V depending on your local power supply.

5.2. Discharging the Battery

Connect the battery pack to your ebike's motor or other load to begin discharging.

5.3. First Use

After installation and initial charging, turn on the battery or your ebike system to begin operation.

6. Maintenance

• Keep the battery dry, clean, and tidy during use and storage. Moisture and stains can lead to aging, oxidation, and short circuits within the battery's internal components.
• It is recommended to charge the battery before it reaches a very low state to prevent excessive discharge, which can negatively impact its cycle life. Recharge the battery before its charge level drops below 25%. A good indicator is when the power display shows only one red and one green LED (not on load) or only one red LED (on load).
• The optimal operating temperature for the battery is between -20°C and 60°C.
• For long-term storage, maintain the battery voltage at approximately 80%. Even if not in use, the battery should be charged and discharged once every three months.
• When transporting the battery, ensure it is at a low power level (30% or less) for safety.

7. Troubleshooting

• Compatibility Issues: If you are unsure about compatibility, compare the outlook and dimensions of this battery with your old battery. Ensure the battery voltage (e.g., 48V) matches your motor's voltage (e.g., a 48V battery for a 48V motor).

• Oxidation Layer on Terminals: If combining batteries in series or parallel and an oxidation layer is present on the surface of the terminals, gently brush the surface with a thin steel brush until the metal glows to minimize connective resistance.

• High Voltage Safety: When combining multiple batteries, if the voltage between any two electrodes exceeds 24V, avoid touching the electrodes with your body to ensure safety.

• Battery Not Charging/Discharging: Ensure all connections are secure and the charger is functioning correctly. Check the operating temperature is within the specified range (0-45°C for charging, -20-65°C for discharging).

8. Specifications

Image: Example specifications for VARUN C20-1 48V10.4Ah battery.

Image: LG/Samsung/LS High Quality Power Cells used in VARUN batteries.

Image: Professional BMS features including various protections.

Image: Certifications including CE and UL.

9. User Tips

• Verify Compatibility: Always ensure the battery's voltage and physical dimensions are compatible with your e-bike model before purchase and installation.
• Proper Installation: Double-check all wiring connections for security and insulation to prevent any electrical issues.
• Regular Charging: Even if not frequently used, charge your battery every three months to maintain its health and prolong its lifespan.
• Temperature Awareness: Pay attention to the recommended temperature ranges for charging and discharging to avoid damaging the battery.

10. Warranty and Support

We provide an 18-month warranty for our ebike batteries.

• Within One Month: If a quality problem arises within one month of purchase, we can send you a new battery upon provision of available proofs.
• Within One Year: For quality problems occurring within one year, we offer free repair services.
• All our ebike batteries are manufactured with high-quality cells and high-performance BMS, and undergo 100% testing before shipping to ensure reliability.

For any further questions, concerns, or support not covered in this manual, please contact our customer service team. We are a professional Ebike Battery manufacturer and welcome OEM and ODM orders.