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Old 05-02-2006, 06:20 PM   #1
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Default 7-cell buildup GP3300

I built a 7 cell pack out of GP3300 packs. I bought two of them and one of the cells fried on one of the packs. I took one off and soldered it onto the other pack. I set it on top for a hump pack for my Rustler. I soldered the positive side of the extra cell to the negative side of the top of the pack using 14 guage wire where the negative wire used to attach at the top of the pack. Then I attached the negative wire from the deans plug to the negative terminal on the extra cell. I charged it and it charged just fine. Then I plugged it into my Dynamite Tazer ESC and it worked fine for about 60 seconds, then my ESC caught on fire! What the hell happened here? This is the way Traxxas said to wire my batteries for 7-cell on their how to section. Should I have soldered the negative on the cell to the positive side at the top of the pack and used the positive on the cell for the red wire to the deans? Does it really matter which way I wire it as long as it stays in series?
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Old 05-02-2006, 06:40 PM   #2
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It doesnt matt er which end you connect the extra cell to, but the problem is probably that you esc was only designed to run on 7.2 volts or 6 cells and the extra cell caused it to fry. The instructions are probably intended for the e-maxx which I think can run 7 cell packs.
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Old 05-03-2006, 05:10 PM   #3
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thats adding an extra 1.2 volts, which could have fried the poor esc, i am gonna guess it was a cheep traxxas one, right? well, find a better esc. you have wired the battery correctly, but the esc was the problem. i did something similar to that, exept with a cordless drill i got for 5$ at a sale...
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