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Author Topic: Make two batteries share the same ground  (Read 3357 times)

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Offline airman00Topic starter

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Make two batteries share the same ground
« on: August 08, 2007, 06:01:32 AM »
To make two batteries share the same ground do I just take the negative wire from a AA battery and connect it to groundl and then  take the 6V 20Ah battery's negative wire and connect that to the same ground? Will this make a common ground or will this just fry my components?
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Offline czwalga00gt

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Re: Make two batteries share the same ground
« Reply #1 on: August 08, 2007, 09:48:51 AM »


Edit:  just saw you're using AA and a high amp hour battery.  I dont think I would can do that.
« Last Edit: August 08, 2007, 09:54:31 AM by czwalga00gt »

Offline HDL_CinC_Dragon

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Re: Make two batteries share the same ground
« Reply #2 on: August 08, 2007, 12:06:48 PM »
As far as I know, theres nothing wrong with that unless they are in series with each other...

I think as long as theres a load that also connects to that same Ground your fine... wait for Dunk or someone more experienced to confirm this though
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Offline hgordon

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Re: Make two batteries share the same ground
« Reply #3 on: August 08, 2007, 01:13:43 PM »
Having a common ground for all of your circuits is generally a good design practice, especially if you have a metal chassis.
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Offline Admin

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Re: Make two batteries share the same ground
« Reply #4 on: August 11, 2007, 09:07:44 AM »
The first thing I always check when someone's circuit is acting funny is if they have uncommon grounds. :P

yeap, connect the negative end of both batteries . . . but do not connect the positive ends together of any different type battery (or even the same type batteries with different levels of charge). What happens is one battery keeps trying to charge the other because they discharge at different rates . . .

Quote
6V 20Ah battery
sounds dangerous . . . is it lithium ion? or a typo?

 


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