Originally Posted by
Smaug1
I feel like you don't know what you're talking about. LiFePo4 is SAFER than LiIon, but with a lot less energy density. It's not widely available in eBike battery packs. I believe its energy density is between LiIon and NiMH.
When I was heavy into R/C airplanes, LiIon was considered too heavy and weak; we used pouch-type LiPo (lithium ion polymer) which is even MORE sensitive. I'll be surprised if that segment hasn't moved onto super caps soon.
From endless sphere comments, it seems like some of the most ardent supporters of LiPo have moved away from it to LiIon. However, nobody mentions LiFePO4.