got to get over a couple of problems first, first one is voltage 2 cell lipo is 7.4v bit of an advantage over 7.2v from the nimh so you couldn't really run both types of battery together and the next problem is energy we are barely keeping the speedo's and motors together for 5 minutes using 4200 at 7.2v so adding more volts and runtime equals more heat to get rid of.
and the final point is safety, they do go bang and do so in a big way, both in use and whilst being charged 130 drivers at a national = at least one bang!
i can see it coming but not next year
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