Battery for SanDisk Sansa Fuze Media Player 2GB 4G 30-Day Money Back Guarantee & 1 Year Replacement Warranty! Capacity: 550mAh 3.7V (2.04 WHr) Dimensions: 38.56 x 39.79 x 3.7mm (LxWxH) Condition: Brand New - 100% OEM Compatible Type: Li-Po