Insten Li-Ion Replacement Battery for Sandisk Sansa e200 Series Keeps the music playing on your SanDisk Sansa MP3 players with this replacement battery. Just unscrew the back cover to replace the old battery Compatible with: SanDisk Sansa e200 series MP3 players E200 / E250 / E250R / E260 / E270 / E280 This is a high capacity / rechargeable Li-Ion (Lithium Ion) battery with premium cell.