The Rechargeable Battery Pack Connector Cable is the replacement you need to take Game Ready therapy on the go. The cable serves two purposes. First to connect the adapter to the battery to charge and then second, to connect the battery to the Game Ready Control Unit. Please note, this is the Rechargeable Battery Pack Connector Cable only. The Rechargeable Battery, Wraps, Control Unit and additional Game Ready accessories are available separately. This cable allows battery to fully charge in just a few hours. Once all four LED lights turn blue on the battery, the battery is fully charged.