[PLUG] experiments - OT: FiOS auxiliary power for BBU

[Marvin J. Kosmal]

On Fri, 19 Feb 2010 10:07:55 -0600
Fred James <fredjame at fredjame.cnc.net> wrote:

<snip>

> >>     
> Tim Wescott
> Thank you for the clarification
> The APC documentation indicates stringing one or more "battery packs"
> to the BBU - if one were to try to duplicate this with just batteries
> and wire, I am assuming (pardon my ignorance here) that one would
> want to wire those extra batteries in parallel - is that true?  IIRC
> parallel (+ to + and - to -) delivers the same current but for
> longer, and series (+ to - as in a flash light) delivers a higher
> voltage but not for longer? Thanks again
> Regards
> Fred James
> 
>


Correct..

In parallel it is + to + etc...

The problem is...Unless the batteries have identical Voltage the most
positive battery will see the other battery as a load and discharge into
it for some period of time.  Till the charges are equal..

YMMV

Marvin