post #1 of 1
12/5/10 at 12:31pm
Thread Starter 

I have a unit here, it takes DC 9V. I don't know its drain, but on the wall-wart it says 850 mA. So let's presume that this unit drains 800 milliamps.

Now I'm making sort of an outboard battery. To get the 9 volts (nearly), I chained six NiMH AA batteries together.

Each of the AA is rated 2350mAh. So six would be 14100 mAh? Is that right?

Consider that's right, and the unit drains 800 milliamps, the maximum theoretic runtime would be 14100/800 = nearly 18 hours of play? Are my calculations right or is something completely off? I admit that I'm a real noob about electricity.

 

EDIT: Problem solved. Admins/mods please delete. Thank you.


Edited by 3602 - 12/5/10 at 1:03pm
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