Renu-It Deluxe Home Battery Regenerator with USB Charging Ports and Tablet Stand ~ BLACK ~ Recharge batteries and safely extend their shelf life. Works with a variety of battery types and sizes. Built-in USB ports - Recharge USB-compatible devices while simultaneously charging your batteries Auto-shut-off timer - Automatically shuts off unit when batteries have charged for 24 hours Built-in tablet stand and mobile phone cradle - Tablet stand gives you a convenient place to place your tablet in the back slot Integrated phone cradle is handy to hold your mobile phone while charging