Guess I really do have to wait half an hour for my iPhone to charge in DFU mode…
@matigo you should be able to take it down to 1%. I tried to do it on purpose today because I replaced the battery. The last one died at around 17%--clearly I didn't replace it with a new battery. :(
iPhone died at around 8%. It was in the "reboot cycle of death" until I put it into DFU mode. Maybe now it will finally get enough of a charge to fully boot.
Now at the scary part of my battery level: 16%. Considering my phone was shutting off around this point before replacing my battery…