iPad 1st Gen boot loop on a dead battery
I just got an old iPad 1st Gen and it hasn't got charge for a long time. When I plugged in to the original power adaptor, it immediately show the Apple logo for about 3 seconds then blank screen then Apple logo again then blank screen and so on. I tried to boot to DFU mode and it works but then I plugged out my cable and the device immediately shut down. I tried to plug in to my laptop but the screen only flickering continuously so I can't boot to DFU mode to restore the iPad. I believe laptop usb ports don't have enough power to charge the dead battery. So basically I'm stuck. Any suggestions?
iPad 3G