Insten Li-Ion Replacement Battery Compatible with 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 Installation is quick and effortless! This is a high capacity / rechargeable Li-Ion (Lithium Ion) battery with premium cell. Compatible with: SanDisk Sansa e200 series MP3 players E200 / E250 / E250R / E260 / E270 / E280