Are you tired of trying to get your treatment sessions done without interruptions, but your battery just seems to not want to cooperate with you? Want to ensure that you will have an uninterrupted treatment session? Then, use the Battery Charger for Li-Ion 2nd Generation InTENSity Devices. Standard batteries can take six hours to charge. Whereas, this charger will charge a completely dead battery in just over two hours! It is user friendly and has an easy to read charger indicator light.