... our portable power features:this mobile power products, built in 800 ~ 2000mA lithium polymer batteries, according ... , MP4, PMP, PDA, NDS, GPSPHONE, PSP, IPOD, iPhone and other digital products add power, carry convenient.1 ... ( maximum ) 2, the charging current: 400mA3, the battery capacity: 800 ~ 2000mAh4, the output voltage: 5.5V ... electronic digital mobile equipment external battery for mobile phone