... , MP4, PMP, PDA, NDS, GPSPHONE, PSP, IPOD, iPhone and other digital products add power, carry convenient.1, working voltage: 5.5V ... ( maximum ) 2, the charging current: 400mA3, the battery capacity: 800 ~ 2000mAh4, the output voltage: 5.5V 5, the ... the charging voltage of about 5.5V range of electronic digital mobile equipment external battery for mobile phone