Rechargeable lithium polymer battery with a built-in controller with three power levels. The charger recharges a battery in approximately 5 hours. Jacket battery kit (98247-12V) features a power level indicator that displays remaining charge and comes with a remote control to change temperature power settings. Kit includes one 4 Ah 12V battery and one charger. Gloves battery kit (98248-12V) includes two 1.1 Ah 12V batteries and one charger.