1. goody921's Avatar
    I got the energizer energi to go back-up battery for iphone 2g (Jailbreaked)....
    However, when I put the external battery on... the power meter increased, but no charge sign is appear....(I think it's just charge for the 1 second the time i put the charger on)....I don't think the iphone detect the back-up battery charger....
    The iphone charge okay with the powerblock the came with the iphone...it just doesn't charge with the external back-up battery....

    --I try the back-up battery on my friend's 2g iphone...it work fine....(his iphone detected the battery)....

    Can anyone tell me what is wrong with my iphone,,and how can i fix it?

    Thank you very much
    01-29-2010 07:39 PM
  2. flyingember's Avatar
    the 2G charges over usb + firewire pins.
    the 3G and 3GS only charges over usb pins.
    (different pins on the dock connector)

    the backup battery device is likely firewire pins only, I have a car stereo this way

    you need a new backup battery or an adapter
    iPod & iPhone Accessories Power Charging Adapter
    this works for more than just a cars I believe
    01-30-2010 06:59 PM