is there a way to boot tethered a 3gs after it's battery dies? it's jailbroken, and I accidentally let the battery die on a roadtrip. When this happened before, the only thing I could figure out was to restore it using itunes then re-jailbreak it. is there an easier solution? It automatically boots up when it reaches a high enough battery level, but I can't get it to enter DFU mode to "Just Boot" using Redsn0w.