Insten Battery for SanDisk Sansa MP3 Players 200,e250,e260,e270,e280 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! Compatible With SanDisk: Sansa E200 series E200 / e250 / e260 / e270 / e280,Sansa E200R series e250R. Voltage: 3.7 V. Accessory ONLY. sansa not included.