Bosch 12-Volt Max Battery Holster/Backup for Bosch Heated Jacket BHB120 POWER: The Bosch BHB120 Battery Holster provides 12-volt max power with DC & USB. It powers the Bosch heated jacket and provides battery backup to cell phones and most other USB charging personal electronics. PORTABLE: Users can keep charging their devices and store the BHB120 in their pocket or on a belt when not in use with the included all-metal belt clip. COMPATIBILITY: The BHB120 backup is compatible with the complete Bosch 12-Volt Max Battery Line including 2.0 Ah and 4.0 Ah batteries and previous generations, as well. COMPACT: Compact and lightweight, the BHB120 is designed to take up little space in jacket storage pocket or on belt.