External battery and AC charging

Hey guys, I have a question.

I have an external battery, the kind with USB outputs to recharge phones, tablets, etc. It seems the product was designed such that using a normal data cable only provides USB charging (i have an android phone and tablet).

Would it be possible to safely solder the contacts on the USB jacks to make the external battery capable of AC charging without the need of a charge only cable? If so, how?

Posted Mar 19, 2013, 7:22 PM UTC

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dsampson92•13 yr. ago

Let me get this straight. You have a battery designed to charge phones and the like. The battery itself is charged by being plugged into a USB charger or the USB port of a computer. You want to modify it so that it can charge from a wall outlet instead?

Haptic_AffinityOP•13 yr. ago

No, sorry if I wasn't clear. I can already charge it from the wall using a normal wall charger. But I want to modify it so that I can charge my phone on it and receive AC charging instead of just USB charging when using a normal usb cable.

dsampson92•13 yr. ago

Your goal still isn't quite clear. If by AC charging you mean you want to provide 120V AC from your battery pack then no, that would be very difficult and would only last briefly anyways

Haptic_AffinityOP•13 yr. ago

See my reply to dextroverted

[deleted]•13 yr. ago

Do you mean the phone and tablet charge faster in AC charging mode than in USB charging mode, and you want to enable that faster charging mode with this battery pack?

Haptic_AffinityOP•13 yr. ago

Correct, I am referring to AC charging mode as shown on an Android device when you look at the battery settings. This is done by using a charge only cable or by using a device that has the same shorted wires in it already, like a wall outlet or some newer designs of external battery and car charger.