[Samsung Galaxy Nexus] msugeek:
I know I'm not the first, so credit where credit is due to all those that came before me with the Nexus and those that came before those with other phones. Major props to Palm for being innovative, having owned a Palm Pre before, it's really ashame that phone never really caught on.

Having said that, I present to you the Inductive Charging Otterbox Commuter Case. Really very much like all the other mods out there. Do some measuring, drill some holes, solder some wire, bam, you're done. This is obviously just another variant on a lot of other mods out there, so this really isn't anything new. I won't go into the nitty gritty details, just tips and tricks I found worked along the way.

To start, obviously you'll need an Otterbox Commuter series case. I thought this one would work best because it has the hard outer shell with a silicone inner lining.

Next you'll need at least 2 of these spring-loaded contacts made by Mill-max. They are 0.137" in height uncompressed and 0.098" in height fully compressed. That's 3.48mm and 2.49mm for you metric folks. These things are tiny, so a nice pair of tweezers will aide you in this process.

http://search.digikey.com/us/en/products/811-22-001-30-000101/ED8110-01-ND/682269

The next thing I bought was 24 awg pre-tinned copper wire. Doesn't have to be this exactly, but I found it worked nicely.

http://www.radioshack.com/product/index.jsp?productId=2102500

I also used some PermaPoxy 5-minute plastic weld to epoxy the pogos into the side of the case. Found it at my local hardware.

http://www.amazon.com/Permatex-8411...ZC6U/ref=sr_1_3?ie=UTF8&qid=1330051726&sr=8-3

The most crucial part of this is accurately measuring (and maybe a little lucky guessing) on where to drill the holes in the side of the case. The method I used was not precise and involved more guess-work than I care to admit. In the end, I had to do a little fine-tuning by scraping some material away in the direction I needed one of the pogos to be. I started off with a 1/32 drill bit and stepped my way up until I could fit the pogo in with a minute amount of play.

For each of the two pogo contacts, I made a small curve in the wire that would wrap around the radius on the back of each pogo. You'll notice there is a solid copper surface contact area on the back of these. I placed the wire around its circumference and soldered it in place nice and smooth. A small set of locking pliers or some sort of small vice will help you free up a hand and hold the pogo while you position the wire and solder it.

Once all of this was done, I took a thick paperclip (toothpick works fine), and mixed up the epoxy and used the toothpick to apply a layer to the inner part of the holes in the commuter case and on the outer part of the plastic-like portion of the pogos. Then slide them in place and use the wire that they are soldered to to position them and hold them in place for a few minutes until the epoxy starts to set. Do this one pogo at a time to make sure you get them in correctly and make sure they are flush on the back with the outer part of the case.

After that, you position the inductive charging circuit from the Palm Pre battery door and then trim and solder the wires to it. The top contact (contact nearest the coil) is ground and the bottom is +5V. Same goes for the pogo contacts on the phone. You will then need to trim some silicone material away from the side where the pogos will need to make contact with the phone.

What you have to do after this is all in how well you positioned things at the start. I had to take my extended battery and back off and go back to the normal battery and back. I also had to trim some silicone material away that was over the regulator circuit of the inductive charging cell, that's the thickest part of the entire piece and it was pushing my phone up too high in the case.

A side benefit of this method is the outer contacts are still maintained and you could potentially design a desk dock, car dock, whatever that would make use of the pogo charging in case the touchstone isn't the most ideal for that situation. Things you could do to improve on this would be:

-Add stronger magnets so the phone would hold to the touchstone better

-Texture the back of the Commuter case somehow to make it not so slick. This also would help the phone stay on the touchstone better

-Sand a little of the material away where the charging circuit will be on the case, would make for a better fit in the case (still bulges at the bottom a bit like it does with the extended battery in)

Feel free to point out other things I could have done better and post up your own versions if you attempt this mod :)