Bob Delbridge posted:I agree. I don't think 14.8v would have an adverse effect on the motor, but getting a 14.8v battery to fit may be the issue.
I have 2 types of 9.6v NiMh batteries. One is approx. 1-1/8"x1-1/8"x4" long, the other is 1/2"x2-3/8"x4" long. The 11.1v LiPo is 7/8"x1-1/2"x4-1/8" long. The 12v NiMh is1-1/4"x2"x2-7/8" long.
What are the mA-Hr or Amp-Hr ratings for the different battery packs?
9.6V NiMH #1: 5.0 cu. in.
9.6V NiMH #2: 4.8 cu. in.
11.1V LiPo: 5.4 cu. in.
12V NiMH: 7.2 cu. in.
It comes down to stored energy which is related to Voltage x mA-Hr. Going from 11.1V to a 14.8V LiPo pack (of same size) may have a lower mA-Hr rating...but the product of Voltage x mA-Hr should remain the same - in theory. In practice the packs are no doubt built using a standard-sized 3.7V cell (3 or 4 in Series or Stacked - hence the terminology 3S or 4S) so there will be limited options on size.
As an aside, some might find it curious that if you open a 9V battery, you might find 6 1.5V AAAA (quadruple-A) batteries stacked.
Likewise, many/most NiMH packs are some number of 1.2V standard-sized (AAA, AA, C, etc.) NiMH cells stacked together. 8 cells x 1.2V = 9.6V. 10 cells x 1.2V = 12V. Etc.
In any event, to increase the top speed you must increase the available battery voltage.
