This is a high-performance replacement digital battery for the Canon BP-828, guaranteed to meet or exceed the OEM specifications of your original. The digital battery is 1.58 x 1.2 x 2.32 inches with an output of 7.4 volts. The chemistry is LI-ION at 2670mAH capacity. Manufactured by Empire Scientific, model number BLI-448-2.8. 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.