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September 29th, 2008

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Q & A: Batteries: Dual-6V vs 12V

Saturday March 16th, 2002
Q & A, MGA, MGB, MGC, MG T-Type, Midget
John,

I just got a 1971 MGB that my brother has had in his garage for the last 13 years. Right now the engine won't run. To make a long story short. I have ascertained that the celunoid engages, but I don't have enough juice to do much more than that. My questions are:

1. Should I replace the two 6 volt batteries or change over to a single 12 volt battery?

2. How difficult is it to change?

3. Does this mean that I would go from negative earth to positive earth? and How does that impact the electrical system?

I would appreciate your insights as I am a novice mechanic and haven't work on an MG for over 20 years. That was a midget and another story.

Thanks again for you help.

Andy Phipps

ANDY!

A modern, single twelve volt battery will probably be more powerful than twin sixes! It will also be about half the price of twin sixes. Only the most "original" of us retain the two six volt batteries.
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