[TG01 ROM Development] CrashMurdock:
OK, here's the latest update. I now have my two new Cameron Sino '1100' mAh Li-Ion batteries installed and battery life is much better and they both seem to be charging completely as it takes much longer for the phone to report fully charged. Now then, that's the good news. The bad news is that due to my poor soldering skills I almost killed both new batteries. Instead of peeling back the plastic cover to locate the positive and negative traces, like you did, I decided to stack the batteries together then connect positive terminals together then the negative terminals together. So here are the steps:

1. After a lot of thought I trimmed the plastic battery case cap at each positive and negative brass terminal to reveal the side of the brass contact. I did this on top of the lower battery and the bottom of the upper battery. This provided a small groove between each matching terminal pair to insert a thick short copper wire.

2. Next, I taped the batteries together using thin packaging tape. Still, no problem.

3. After that I inserted the short copper wire segments into their respective grooves and it looked great and didn't interfere with inserting the battery because the original face of the battery contacts weren't affected. So far so good.

4. Next, I only needed to add a tiny bead of solder over the exposed copper wire segment to connect both positive terminals then repeat for the negative terminals. OMG, this is where it started going wrong. To avoid a cold solder joint I know you have to heat the base first (the stubby copper wire in this case). Knowing that the battery cap is plastic I couldn't apply much heat and as soon as I touched the solder it just ran to the face of the terminals away from the copper wire. Now there was a buildup of solder where I didn't want it because it would interfere with the already tight fit of the battery in the battery compartment.

4. I kept fiddling around with it and finally got the positive terminals connected then the negative terminals, but not before slightly melting the plastic caps on both batteries that are now a little deformed. Not only that the brass terminal strips started sliding around a little bit from the heat so now are skewed slightly. I have to say the solder job looks like sh*t but luckily it's working fine. I wish I had access to some kind of cold solder compound or electrically conductive adhesive that would have been much better.

OK, so it works but even 2000 mAh capacity, as you know, is still not near enough so my next trick is to add the original Toshiba battery like I had originally planned. Since I don't quite have the vertical room to stack it on top of the existing pair of batteries it will need to be installed with its terminals facing the top battery terminals. I found some tiny contact springs out of an old LED AAA flashlight and need to attach them to the terminals of one of the mating batteries. That way I can just add a small battery retainer and easily snap the 3rd battery in place or just as easily remove it to get access to my sim card or microSD card. If you have any suggestions I would certainly appreciate it because I'm afraid to try to solder them in place with my limited skills.:eek::eek::eek:

Thanks in advance! :D