Man.. I don't know what kind of racing or bashing you're doing.... but in 17 years I have never had anything damage my car or batteries resembling driving a nail through my battery! lol.. and that was a Lithium Ion and not a Lithium Polymer.... Hey.. check the cell phone in your pocket... it probably has a LiPo in it!

As for the voltage dropping off.. if you buy good NiMh packs and take care of them, they don't drop off like you say.. actually they maintain a better level voltage over a LiPo... the NiMh actually get better with care and a little use over their race life. It does however take some work.. discharging, equalizing and charging..

It's a personal choice... both are good..


Jerome