This is a high-performance replacement cellular battery for the Apple 616-0667, guaranteed to meet or exceed the OEM specifications of your original. The cellular battery is 3.58 x 1.23 x 0.146 inches with an output of 3.8 volts. The chemistry is LI-POL at 1510mAH capacity. Manufactured by Empire Scientific, model number BLP-1278-1.5. 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.