Extended Usage Time: The 10Ah Capacity Allows For Extended Usage On A Single Charge, Reducing The Need For Frequent Recharging And Providing Longer Travel Range. Lightweight and Portable: The battery’s compact design allows users to easily transport and install it, adding to the wheelchair's overall mobility convenience. Efficient Charging: The lithium-ion technology ensures quick and efficient charging, so users can rely on it daily without long waiting times. Enhanced Safety: Comes with in-built protections against common battery issues, ensuring safe usage and a longer battery lifespan. Compatibility: Specifically designed for the W5517 and W5521 wheelchair models, providing optimal compatibility and performance with these devices.