1050mAh NP-20 / NP20 Replacement Battery for Casio Exilim EX-M1, M2, M20U, S3, S20U, S100, S500, S600, S770, S880, Z4U, Z60, Z70, Z75, Z77 - Japanese Cells Ultra high 1050 mAh power -- the higher the mAh rating, the more power a battery will store and the longer it will last Manufactured using premium Japanese grade A battery cells Includes a 3-year warranty