This detachable, rechargeable lithium-ion battery (Cat. No. 29025) powers the Klein Tools Cooling Fan 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.Features Built-in smart protection Rechargeable battery designed to power Klein Tools' cooling fan, small USB-C devices, headlamps, phones and more Rugged housing; IP 54 rating and 6.6-Foot (2 m) drop protection USB-C to USB-A cable included 4-Segment LED Battery Status Indicators, Smart Battery Protection, Easy Mount onto Klein Tools Hard Hats 3200 mAh capacity battery; up to 10W of total power 4-segment battery status LED indicators Easily attach to Klein Tools hard hats/safety helmets accessory mounts; no straps needed 2 USB-C input and output ports to simultaneously power or charge 2 USB devices WarningsRead, understand, and follow all instructions, cautions and warnings attached to and/or packed with all Hard Hats and Accessories before each use. Failure to follow these warnings and instructions may result in serious bodily injury or death Capacity: 3200 mAh Power: Up to 10W Battery Life: 300 Cycles Voltage: 5 V (Output) Battery Type: Rechargeable Lithium-Ion Charge Time: Up to 2.5 hrs Weight: 0.25 lbs (109 g) Overall Length: 3.5 in. (8.9 cm) Overall Width: 1.7 in. (4.3 cm) Overall Height: 2.1 in. (5.3 cm) Depth: 3.25 in. Material: Plastic, Metal USB Ports: 2 USB-C input/output Battery Cell Type: 18650 Li-ion Ingress Rating: IP54 Drop Protection: 2 m (6.6 ft) Compatibility: Klein Tools Hard Hats/Safety Helmets DownloadsSpec SheetVideo DownloadSafety Data SheetInstructions60155-Instructions- WEB.pdf