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? 2. For both cases (energy/mass and energy/volume), which battery type is best (NiMH/Li-ion/Li-po)? --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .