Preface

 The battery is the heart of every e-bike—and in models like RollRoad EMMA SHARK and LEON, it’s designed for both high performance and long life. However, even the best battery depends
on proper maintenance. By following a few scientific and simple practices, you can greatly extend its service life, prevent malfunctions, and keep your e-bike running smoothly for years.

 Battery Usage and Maintenance

(1) Avoid Keeping the Battery in a “Starved State”

 1. In daily use, avoid letting the battery power drop below 20%. When power is low, recharge the front and rear batteries in time. Prolonged undercharging can damage the cells.

 2. Check the power levels of the front and rear batteries monthly. They should remain roughly balanced. If one battery’s power is lower, charge it separately. Charging both batteries
together when they are unbalanced can lead to overcharging of one battery and undercharging of the other, reducing their lifespan over time.

 3. For the dual-battery RollRoad EMMA, SHARK or LEON, using two chargers simultaneously is recommended when both batteries are depleted—this improves charging efficiency and consistency.

 To ensure optimal performance and safety, always use RollRoad’s original chargers. You can find the compatible charger models: https://roll-road.com/collections/replacement-parts/products/battery-charger

 (2) Avoid Overcharging

 1. Keep the battery within the “golden range” of 30%–80% whenever possible. Once the charger indicator turns green (fully charged), unplug it promptly. Avoid overnight charging.

 2. Perform a deep calibration once a month: discharge to 10%, then fully recharge to 100% using the original charger. This helps the Battery Management System (BMS) recalibrate the display
accuracy.

 3. Never charge in extreme temperatures (above 45°C / 113°F or below 0°C / 32°F) to avoid damaging the cells.

 (3) Battery Usage Instructions

 1. During charging, the BMS disables discharge automatically. If you need to ride during charging, simply unplug the charging plug—the battery will resume normal discharge instantly.

 2. Always turn off the battery switch before removing or installing it. This prevents electric sparks and protects the connectors from short circuits.

 3. Use only the original charger provided with your RollRoad e-bike. Do not charge in humid places such as outdoors during rain or in bathrooms—moisture can cause short circuits.

 4. Correct Charging Sequence:

 When starting to charge: connect the charger to the battery port first, then plug the charger into the wall outlet.

 When charging is complete: unplug the charger from the wall first, then disconnect it from the battery.

This helps avoid voltage spikes that can harm the battery or charger.

 (4) Long-term Storage Maintenance

 If your e-bike won’t be used for over a week, charge both batteries to around 75%, turn off the battery switch, and check power every 1–2 months. If power drops below 50%, recharge
to 75% promptly to keep the cells active.

 This is especially important for models like RollRoad Ebikes, which use high-energy-density EVE Energy 21700 cells—proper maintenance ensures they maintain full performance even after
long storage.

 Conclusion

 By maintaining your battery correctly, your RollRoad EMMA, SHARK or LEON e-bike will retain its power, range, and performance for years.

If you ever encounter battery issues or have maintenance questions, contact the RollRoad after-sales support team for assistance.

 Pro Tip: A well-maintained battery doesn’t just last longer—it delivers smoother acceleration, longer range, and better overall riding experience.