Compatible with all RYOBI 40V Lithium batteries, the 40V Lithium-ion 2-In-1 USB/Battery is the perfect addition to your RYOBI 40V tool collection. It's lightweight compact design connects to the top of your 40V Lithium battery and doubles as charger for small electronic devices. Designed for convenience, the LED indicator shows status as the battery is charged and maintained. This charger also features innovative charging technology that protects and extends the life of your RYOBI 40V Lithium batteries.