This is a high-performance replacement two-way battery for the Icom IC-E91, guaranteed to meet or exceed the OEM specifications of your original. The two-way battery is 2.29 x 1.91 x 0.82 inches with an output of 7.4 volts. The chemistry is li-ion at 1600mAH capacity. Manufactured by Empire Scientific, model number BLI-BP217. We offer a 1 Year Warranty with purchase. See this product elsewhere at a lower price? Call or email us; we have a Price Match Guarantee.