Lg F9100/9200 Li-Ion 900Mah This is a high-performance replacement cellular battery for the Lg F9100, guaranteed to meet or exceed the OEM specifications of your original. The cellular battery is 1.38 x 2.11 x 0.23 inches with an output of 3.7 volts. The chemistry is Li-Ion at 900mAH capacity. Manufactured by Empire Scientific, model number BLI-953-.9.