There was tutorial that I read which involves splicing usb wires and connecting it straight to the battery to charge it. Id say if you have any spare usb wires and extra time to give it a shot and even possibly build something out of it. As for things online they make them not sure if ive seen any yet for the X though.
Found it: 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.
Re: Is it possible to charge spare battery without phone?
WHOAH, PEOPLE! PLEASE RE-READ THE QUESTION. NO ONE hs answered it!
The question is NOT "Is it possible to power the phone without its battery"! WHY is ANYONE answering THAT question in THIS Thread - makes absolutley no sense, and even those answers are not written well at all. Although, answered correctly, that OTHER question is something many are curious to know the correct answer to. Just not in this thread.
To answer the actual QUESTION: YES, you CAN charge your cellphone battery when it is OUTSIDE of, Not connected to, or NO WHERE NEAR your phone. WARNING: IF you chose to do this, you run the risk of over-charging the battery. Why? Because:
1. MOST home wall and car chargers - yes, even the ones that come WITH the cellphone - do NOT regulate the battery charging cycle AT ALL. They merely only provide a steady voltage and constant amperage. Period. Usually 5v at 900ma (car and wall, and most usb 3.0 ports) or 500ma (most usb 2.0 ports)They're "dumb". Remember VOLTAGE can under or over charge, AMPERAGE does NOTHING to that. Voltage is pushed to the device, AMPS are Pulled by the device. Make it is easy on yourself, that IS the best way to think of it. Period.
2. The CELLPHONE ITSELF regulates all charging cycles of the battery. When the battery is IN the phone, of course.
There ARE chargers that CAN regulate charging and with proper cycles, but they arent cheap. You can find them at Hoby stores everywhere. Anywhere from 35.00 to 120.00 US - single cell to multi cell.
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