powermat mod ***Walkthrough and pics now available!!!***

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jacob.alberty

Member
Jun 7, 2010
28
4
I did this mod and it works great but I noticed the phone thinks it is in usb mode and only pulls 450mA, does anyone know if this charger can handle 650mA? if so shorting green and white together should tell the phone its connected to an AC adapter and let it pull 650mA and charge faster. The only problem is then the phone will think its charging nonstop, maybe thats what the other two pads on the receiver are for?

Update: Tried just shorting white and green wires (D+ and D-) noticed no ill effects and i'm getting full 650mA on the pad soo...
 
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A

Aeltar

Senior Member
Jun 16, 2011
228
54
Excellent walkthrough, OP! Your pictures are down, but it's easy enough to figure out what to do with the information you gave.

I'm considering modding my Kraken case, but I'm not too sure how well it'll work with the thickness of the outer case. After all, induction becomes horribly inefficient after one wavelength, and magnetism will obviously be affected. I'm not sure what frequency Powermat uses for their chargers, but let's hope it's longer than ~2 mm. Wish me luck!

I'll report back with results when I attempt the mod. I expect Otterboxes to be roughly the same in terms of efficacy, as well as any ballistic case I've ever seen, so this should apply to those to at least some extent.


ps: if you don't like powermats, I have a feeling this thread may not be for you.
 
T

thanitos

Senior Member
Apr 30, 2012
880
202
It would be nice if they would just make a battery that will work with a powermat. I'd love to have one with my i777 but I'm not going to try to build my own, a nice little USB dongle would be cool while I'm home I wouldn't mind having that stuck in the bottom to just toss it in the matt and walk away. Is a power mat a must have for a user on the go? No, you can just toss your phone on the plug if you need to charge it for a long period but the concept is nice just toss it down and be done with it. I have the black case att offers for my phone wouldn't mind sticking it all in that. Is something like a micro chip that lays flat on the battery then runs leads to the battery connections possible without Modding the case? I was thinking if you could peal the sticker off the battery for that little 16th of an inch and get a small enough magnet setup inside the stock housing that'd be nice, any thoughts?

Sent from my SGH-I777 using xda premium
 
K

Kishan3593

Member
Aug 8, 2012
5
0
Hi mate, im pretty new to the forum as i just got a SGS2 and i was looking for powermat mods when i came across your post, very cool stuff and a awesome job to say the least, i wanted to something similar and i just wanted to know if its possible to wire the powermat receiver directly to the USB port(sorry if this has been asked before). Any help and advice would be welcome

Thanks in advance
 
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    TannerBlair
    Okay, I finally made ten posts, so here is a full walkthrough. I hope you like it!

    The case I used:
    http://www.amazon.com/gp/product/B005P0YJBG/ref=oh_o01_s00_i00_details

    Cable to buy:
    http://www.amazon.com/StarTech-com-UUSBHAUB1RA-Feet-Micro-Cable/dp/B003YKX6WC/ref=pd_cp_e_4

    Really, any micro-usb cable should work, but I like the right angle on this one.

    Powermat reciever:
    http://www.amazon.com/Powermat-Batt..._1_1?s=wireless&ie=UTF8&qid=1326948784&sr=1-1

    As near as I can tell, any of them will work, but this one is really cheap.

    Total cost of all three components is less than $20.

    Step 1:

    Destroy the plastic housing on the powermat reciever. When you get done, you should be left with something that looks like this:

    https://www.dropbox.com/s/g9baja3sx4qnc7g/20120118_223732.jpg

    Obviously, this one has a usb tip already soldered on to it. We'll get there.

    Step 2: Clean all of the sticky stuff off of the powermat with an exacto knife or rubbing alcohol, then remove any leads from the four terminals across the bottom. (There should only be leads on pad 1 and 4).

    Step 3: Cut your usb cable in half, leaving around an inch-and-a-half of wire on the end with the micro-usb connector. You can throw away the other half.

    Step 4: Now for the hard part. Strip back the black exterior about a half inch, and trim away the braided shielding. Cut all of the wires off EXCEPT the red and black wires. These are your ground and your lead wires. Then VERY CAREFULLY strip them. I would recommend just scoring the material and pulling rather than trying to cut it and remove it without damaging the wires inside.

    Step 5: Now position the unit with the black magnet upwards and the four terminals towards you. Solder the red lead wire to the far left terminal, and the black lead wire to the far right.

    Step 6: Place a piece of electrical tape over the soldered wires to reinforce them.

    Step 7: Trim away as much of the plug end as you feel comfortable with. If you cut the perforated part off, you can get the wire to run straight down and fit much more neatly.

    Step 8: Place the unit in the case magnet-side up, and push the plug through the usb port hole in the bottom of the case. It should now look like this:

    https://www.dropbox.com/s/245em6bj2clmm8r/20120118_224257.jpg

    Step 9: Put your phone in the case, and plug the usb tip in. Your phone will now charge on a Powermat charger.

    Step 10: Profit???


    Final product in case:

    https://www.dropbox.com/s/zmgvnwomuphbv67/20120118_222845.jpg
    View

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