Check the listing for details. Klein Tools 29025 Modular Battery for Klein Tools 60155 Hard Hat Cooling Fan. Condition: New. Listed at 41.99 USD. Klein Tools 29025 Modular Battery for Klein Tools Cat. No. 60155 Hard Hat Cooling FanThis detachable, rechargeable lithium-ion battery (Cat. No. 29025) powers the Klein Tools Cooling Fan (Cat. No. 60155) which is designed for use with Klein Tools' hard hats and safety helmets. The battery attaches to Klein's patent-pending front/back accessory mounts for easy attachment and removal. It powers the dual-fan which forces outside air into the shell to push out stale hot air, facilitating cooling in 16 different configurations for efficient airflow. This modular battery can also charge other small USB devices like headlamps, phones, jobsite speakers, and more.Rechargeable battery designed to power Klein Tools' cooling fan, small USB-C devices, headlamps, phones and moreEasily attach to Klein Tools hard hats/safety helmets accessory mounts; no straps needed3200 mAh capacity battery; up to 10W of total power2 USB-C input and output ports to simultaneously power or charge 2 USB devicesBuilt-in smart protectionRugged housing; IP 54 rating and 6.6-Foot (2 m) drop protection4-segment battery status LED indicatorsUSB-C to USB-A cable included