NAC battery question

[Huw Powell]

> Let's say 1W average output and 50% efficiency.  1W@ 8 ohms is about 
> 0.33A (i^2r=P).
> So 0.33A for a 700A-H battery sounds like 2100 hours x 50% = 1050 hours.

Make that 525 hours for stereo.

Plus the source device.  And the light bulbs in both, if any.

And I think the efficiency factor might be off by an order of magmitude. 
  Still good for a day or two of continuous running.

A more typical 400 AH battery that is a couple of years old should still 
hold up for a third of that, say 8-16 hours...

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/