As far as I know those Ching who currently playing with 2 cell and 3 cell Lipo with 1/12 pan car at JV, is mainly due to
1. some Ching are RC helicoptor player so they like to use the current 3 cell lipo for 1/12 pan car
2. 7.4V 1800mah is economical which give 6-8min play time (I was told it is about HKD150 ^^)
3. fast in straight road when using 3cell lipo