Unless I misunderstand what Al is looking for, C/5 will tell him nothing . C/5 will verify the Mfgrs, mah rating -- nothing more .(and this will be true only if the ambient temperature is controlled at the spec. # generally 80 degrees F)

The only discharge rate that is meaningful in flight applications is the current you are drawing "in flight" ---- then you have a realistic measure of the limits of your pack. This number is probably no lower than 250ma with 500ma very possible --- even higher in some cases of binding surfaces servo ganging etc.

Al is also correct in pointing out that peak detection will give you less than a "full" charge --- it depends where on the curve the "peak" cut off is chosen --- and after it is chosen from a design perspective where in fact it occurs on production types . These can be two widely different numbers . You may object to his 5% differential statement but that is both reasonable and close. My repeatable test number comes out at 2.5% .

In order for any test number to be valid, --- pro or con --- it must be repeatable, by definition, or you have meaningless numbers being influenced by some undefined variables which now must be identified and controlled.

Frankly, if Al has flown with his current set-up long enough to have confidence and success then he should stay with it. At that point we are in a Brand and design preference discussion and there is NO test to end that discussion.

Not trying to be argumentative, just informative.