I found these pack of 2 2s3p 5.7ah 25-25c lipos on HobbyKing recently looking for a good battery setup:
I was very interested in these. If you put 6 in series like @Namasaki did in his high power build, the esk8 calculator is estimating a range of 35 miles. 190kv motor, 2.25 gear ratio, 90mm wheels gives a ~31mph at 80% efficiency.
Does anyone have input? A 42 mile range for about $130 (6 batteries and bms) sounds extremely appealing!