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 Which terminals to Solder on a gutted T3i battery? 
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Joined: Wed Jun 02, 2010 2:41 pm
Posts: 8
Post Which terminals to Solder on a gutted T3i battery?
I'm trying to figure out which wires (positive & negative) to solder onto which terminals. It would seem relatively easy as the chipboard has a "b+" and "b-" on the chipboard. But why is there a 3rd terminal "com"? It is throwing me off. This battery will only have the negative and positive wires going to the gutted T3i battery from a dc/dc converter dropping the voltage to 7.5.

Should I just solder the negative cable to the "b-" terminal on the battery chipboard and the positive to the "b+"? Do I need to do anything else? What is the "com" terminal for and do I need to do anything with it?

I will included pictures so that you can see what I'm looking at. Thanks everyone.


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Sun Oct 16, 2011 1:54 pm
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Joined: Tue Jul 08, 2008 12:36 pm
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Location: Antarctica/California/New Zealand
Post Re: Which terminals to Solder on a gutted T3i battery?
I'm not 100% sure about the T3i, but if it is like others, you should only need the + & -
You may get a battery comms failure notice from the camera when you put it in and start up, but on most models you have the option to ignore this.

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Mon Oct 17, 2011 12:01 pm
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Joined: Wed Jun 02, 2010 2:41 pm
Posts: 8
Post Re: Which terminals to Solder on a gutted T3i battery?
Antz wrote:
I'm not 100% sure about the T3i, but if it is like others, you should only need the + & -
You may get a battery comms failure notice from the camera when you put it in and start up, but on most models you have the option to ignore this.


I'll try it out and report back. Thanks for the help.


Wed Oct 19, 2011 5:17 am
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