On Sun, Oct 3, 2010 at 1:55 AM, V G wrote: > Hi all, > > I've been doing a little reading on NiMH, Li-ion, and Li-po batteries. > Some of the information is a bit confusing. > > 1. What is energy density anyway? Is it energy/mass or energy/volume? Either/both. Depends who you're asking and what you're interested in. Personally I'm more interested in mass, but YMMV. > 2. For both cases (energy/mass and energy/volume), which battery type > is best (NiMH/Li-ion/Li-po)? LiPo almost certainly has the edge regarding volume due to more flexibility about packaging. Lots of people would also claim it's best if you're interested in mass, but last time I looked there was still no significant difference between LiPo and LiIon regarding what's commercially available. NiMH trails both significantly. Chris --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .