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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