>>372774884
Voltage doesn't really matter for comparing capacity in mAh. I think lipo batteries are intrinsically around 3.7v compared to 1.6v on nimh, but level shifters are efficient enough anyway. 

>>372775037
Probably, plus some people waggled their wrists so hard that the rift battery would temporarily disconnect, so there are downsides. I still wish for hot swapping though. I even have a whole other pair of index controllers after my warranty ran out but it's a pain to repair them.