2-Pack Leica GEB221 Battery with Universal Charger & 8000mAh Portable External Battery Replacement - Compatible With Leica TPS1200, GEB221, ATX1230, GPS1200, GPS900, GRX1200, GS20, GX1200, PIPER 100 Replacement Battery and Charger for Leica TPS1200, GEB221, ATX1230, GPS1200, GPS900, GRX1200, GS20, GX1200, PIPER 100, PIPER 200, RX1200, RX900, SR20, TC1200, RX1200 Series Universal Charger features adjustable slider to charge different lithium-ion batteries (3.6V/3.7V/7.2V/7.4V) & AA/AAA batteries. Charge your battery by plugging the charger into a USB port. The external battery pack can charge the Leica GEB221 Battery together with the Universal Charger. You can also charge your phone, tablets and other devices that charge via USB. It has a convenient small size that fits nicely in your pocket purse or small bag Leica GEB221 Battery Specs - Capacity: 4400mAh, Voltage: 7.4V, Upstart Battery Brand, Lifetime Warranty, External Battery Pack Specs - Capacity: 8000mAh, Dual USB Output (2x 5V/2A), One Year Warranty On Sale for a Limited Time!