Right where you spoke of Watt/Hours........
.........bc ([EMAIL PROTECTED]
http://www.widomaker.com/~conk
Williamsburg, VA 23185
On Thu, 12 Feb 2004, Rick Eckel wrote:
> Now where was it that I said that battery pack capacities weren't measured
> in A/Hr??? ;-)
>
> Rick
>
>
> At 02:17 PM 2/12/2004, Simon Van Leeuwen wrote:
> >uhhh, I have to disagree Rick. Ben and Bill rightly point out battery
> >capacity is measured in A/Hr.
> >
> >Rick Eckel wrote:
> >
> >>You might want to rethink that Simon.
> >>
> >>A 4-1000mah cell pack is nominally 4.8 watt/hours. The 5-1000mah cell
> >>pack is nominally 6.0 watt/hours. Clearly the 5 cell pack has more power.
> >>
> >>It is unclear to me why the 5 cell pack wears down quicker.
> >>Simplistically with a pure resistive load Ohm's law would explain it.
> >>The receiver and servos present a bit more complicated load.....
> >>Motors use less current at higher voltage to drive a given load.
> >>Except for minor efficiency effects the motor uses the same amount of power.
> >>
> >>However I'm willing to accept that a 5 cell pack will be used up faster
> >>in a given system based on the user experience reported here.
> >>
> >>Hope this helps
> >>Rick
> >>
> >>
> >>At 06:24 PM 2/11/2004, Simon Van Leeuwen wrote:
> >>
> >>>Given the above if one has a 4cell 1000mA pack and adds another cell,
> >>>the voltage has increased, but not the total amount of power available.
> >>>It is still 1000mA/Hr.
> >>>
> >>>This means that the 1000mA 5cell pack will deliver ~20% less mA/H, which
> >>>equate to less operating time.
> >>
> >
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