The Skullerz 8883 Rechargeable Hard Hat Accessory Power Bank is designed to power a variety of devices, including the Skullerz 8884 Hard Hat Fan and 8886 Wide Beam Headlamp, small USB-C devices, phones and more. This battery pack easily installs onto Ergodyne hard hats and safety helmets using their built-in accessory mounts, eliminating the need for straps. With a powerful 3350mAh capacity battery, it delivers up to 10W of total power, providing reliable energy for your