If you can't get your battery to charge, here's a post I found (from someone else) on a creative way to power your phone when your in this situation:
NOTE: I TAKE NO RESPONSIBILITY FOR DAMAGE DONE TO ANY PHONE, BATTERY, ETC. FOLLOW THESE STEPS WITH CAUTION TO AVOID RISK OF DAMAGE.
1. Take your cable
and cut off one of the ends, leaving a standard USB plug at the opposite end to plug into your computer.
2. Now you need to strip about and inch of the wire off until you get to the core where you should see 4 colored wires (red, black, white, and green). The colors don't really matter and they may vary, just as long as you can see a red wire and a black wire.
3. Strip off about a quarter inch of the rubber sleeving on the red and black cables, exposing the actual metal wire.
4. Twist the metal strands of each of the wires a couple of times so that all of the wires from the black cable are together and all of the wires from the red cable are together. This is just to make sure that you don't create a short circuit.
5. Here's where it gets a little tricky. You are going to use this cable to make the phone think the battery is fully charged, when in fact you will just be powering the phone using the power from the USB port. Pull out the battery on your phone and find the 4 exposed metal slots (the battery terminals).
6. Each of the far terminals should be labeled with a plus (+) or a minus (-). What you need to do is put exposed leads on the red wire up to the positive terminal and the leads of the black wire up to the negative terminal.
7. While still holding the leads on their respective terminals, slide the battery back into place in the phone. MAKE SURE THE WIRES ARE NOT TOUCHING WHEN YOU PUT THE BATTERY INTO THE PHONE! BAD THINGS COULD HAPPEN ONCE YOU PLUG THE CORD INTO THE COMPUTER!
Note: As tested by parm289, you can skip step 7 and just use the cable to charge the battery if you'd like. He recommends allowing it to charge for 6-7 minutes before placing it back into the phone. Thanks parm!
8. Once the battery is in place and the wires are on the correct terminals but not touching each other, plug the USB cord into the computer. If all has gone as it should, the screen on your phone should come on (may have to press the power button) and the phone should be telling you that the battery charge is okay and that it is okay to program. YAY! Your phone is almost back to normal!
9. Go back up to the previous section in this post that tells you how to reflash the .sbf and follow all of the instructions there. Once that has finished flashing the .sbf to your phone, your phone should be back to working order! You will most likely have to redo the entire setup on your phone but at least your phone is no longer a fancy paperweight
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