... actually 4,000mAh) Battery type: Li-polymer battery Input voltage: 5V DC Features: Works with most MP3 players, PDAs, cell phones and USB ... powered devicesIdeal for extended calling, long trips, gaming and listening to musicWith a power button and three ... : 5,000mAh (theoretically 5,000mAh, actually 4,000mAh)Battery type: Li-polymer batteryInput voltage: 5V DC, 1.0AOutput ...