This is a high-performance replacement battery charger for the Charger/Battery Combo AC Charger with 4 NiMH AA, guaranteed to meet or exceed the OEM specifications of your original. The battery charger is 9.3 x 6.3 x 1.5 inches with an output of 12 volts. The chemistry is NiMH at 2400mAH capacity. Manufactured by Empire Scientific, model number CHG-1000DC. 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.