This is a high-performance replacement cordless battery for the Cisco 74-4481-01, guaranteed to meet or exceed the OEM specifications of your original. The cordless battery is 4.34 x 2.03 x 0.445 inches with an output of 3.7 volts. The chemistry is Li-Ion at 2400mAH capacity. Manufactured by Empire Scientific, model number CPL-533. 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.