Warning: while soldering be careful of solder fumes, wear eye protection and don't burn yourself. Note that charging batteries can be dangerous especially Li-Ion but the work detailed here means we are effectively generating our own internal 5V supply in the phone and connecting this directly to the USB power connections as they come into the phone. It is the equivalent of connecting a micro USB cable to the phone from a 5V USB charger, only its wireless. You have been warned and I am not responsible for your actions.
This S7189 quad-core Android phone from Star was pretty cheap around £100 and it worked well. I found the front facing camera was not the best, but for the price I can live with it. Screen was also pretty good with a reasonable viewing angle. It was also pretty slick running any Apps I downloaded from Play with no signs of lagging.
|Palm Internal Charging Circuit|
|Palm Back Cover|
|Circuit Cut Out of Plastic Cover|
|Sticky Cover Preserved|
|Stuck to Clear Film|
|S7189 Back with Cover Removed|
|Routed Copper Tape|
|Palm Charge Circuit Added to S7189 Back Case|
|Phone Placed on Charger|
|Phone Now Charging|