Industry-leading quality lithium-ion battery cells Innovative temperature and overload protection optimizes performance for longer battery life Easy-view fuel gauge displays remaining charge Durable impact-resistant housing protects against drops and vibration Compatible with all Hercules 20V cordless tools With 20V 5 Ah of power at your command, this Extended Performance Lithium-Ion Battery delivers more power, longer runtime, and less downtime*. This hardworking battery is made to withstand impact, extreme weather, and long times in storage.