|Feb 25, 2010, 05:37 PM|
Joined Sep 2008
20C vs. 40C Watts at same discharge rate?
Given three exact batteries except the C rating...
1800mAh 4S Lipo Pack 20C
Constant Discharge: 20C (36A)
Peak Discharge (10sec): 30C (54A)
1800mAh 4S Lipo Pack 30C
Constant Discharge: 30C (54A)
Peak Discharge (10sec): 40C (72A)
1800mAh 4S Lipo Pack 40C
Constant Discharge: 40C (72A)
Peak Discharge (10sec): 50C (90A)
With the same discharge rate of 36Amp for each pack, would the 40C pack hold its Voltage better and offer higher Wattage?
|Feb 25, 2010, 06:59 PM|
Adding to that...Depends a lot on the cells and if they can hold voltage under a load. It could be that a 25C pack that is better made (better cells) can hold higher volts under a load than a cheaper 40C pack...
|Feb 25, 2010, 08:04 PM|
Also if the packs C rating is correct, then the 40C pack won't get as warm as a 20C pack would at the same discharge rate. The 40C battery is supposed to have less internal resistance than a 20C pack.
|Feb 25, 2010, 11:28 PM|
using acurately rated(neither over nor under rating) 40C and 20C packs:
at 20C discharge, you get roughly 5.6% more voltage and 11% more power from the 40C pack.
at 40C bursts, you get 12.5% more voltage and 26.6% more power from the 40C pack.
at 5C mild discharge, you get 1.3% more volts and 2.6% more power from the 40C pack.
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