Rechargeable NiCd battery pack for the GVP series PAPR units. Provides 8 hours of continuous use. Charges in 14-16 hours. Weighs 2.5 lbs. Incorporates an indicator light to signal need for recharge. This battery is included in the GVP-1 and GVP-CB assemblies. Sold by the each. Does not include 110V charger GVP-112.