Weight and current

[steveo]

remember the ampacity will be smaller unless you use a higher C rating than the 5000mah you have- i dont think your formula will work out quite like you want

if you used a 6s battery with correct rpm motor geared for the same speed then you might be able to use the smaller mah battery making your system more efficient

[simplechamp]

Originally Posted by steveo

remember the ampacity will be smaller unless you use a higher C rating than the 5000mah you have

But the lighter vehicle should draw less current. So yes, a smaller capacity battery wouldn't be able to produce as much current, but it wouldn't need to produce as much since the lighter vehicle presents a lower load.

I don't think the 25% lighter = 25% less current is quite right though either.