23 Pocket DeWalt USB Charging Tool Backpack. Use your DeWalt 20V MAX Lithium ion battery and our internal custom design battery dock as a USB charging source. Battery not included. USB charging battery dock simultaneously charge 2 devices via USB ports. Maximum 2 Amps shared output. Three Internal charging wall pockets fit tablet， phone， and/or camera. Low battery cut-off protection monitors battery voltage to avoid battery charge over-depletion. 20 Multi-use pockets inside and 3 outside help organize a wide variety of hand tools. Vertical tool wall to organize a variety of extended screwdrivers and hand tools. Large pads on back for extra comfort make carrying heavier loads more comfortable on stress areas of the back. Padded web carrying handles and adjustable shoulder straps make carrying more comfortable， plus convenience handles on each end for quick “from stow” to “go”. Base pad feet helps reduce wear and abrasion. * *