Built-in protection circuit (PCM) prevents over charging/discharging.
SanDisk Sansa Clip / Zip MP3 Player Rechargeable Battery - 3.7V 300mAh - 303038
603450 3.7V 1200mAh Lipo rechargeable Battery JST ZH 1.5mm 2pin plug For GPS MP3
Aofan 1 Pcs Battery Cable Alligator Clamp to O Ring Terminal Connector for Car Inverter, Car Audio,Car MP3 12V 24V 50A
10 PCS 600mAh 3.7V Lipo Li-Polymer Battery For MP3 MID GPS PDA Bluetooth 503040
Piaggio Vespa MP3 500 500CC Motorcycle Replacement Battery
POWEROWL 12 Pcs CR2032 3V Lithium Battery for your Toys, Games, MP3 players, Stopwatches (Purple)
