Ryobi P135 18V One+ 6 Port Lithium Ion Battery Supercharger (18V Batteries Not Included/Charger Only) CHARGE YOUR BATTERIES: Up to six Ryobi batteries can be charged in this system, from the One+ Lithium Ion system to older NI-CD batteries MULTIPLE STORAGE SOLUTIONS: Keep the charger vertical, horizontal, or hang it on a wall with onboard mounts USB CAPABLE: Plug in a usb 2.1 cable (not included) and charge your phone along with your power tool batteries FUEL GAUGE: Blinking LEDs indicate whether your batteries are charging, charged, or damaged TEMPERATURE GAUGE is also built in, giving you added information