LiFePo4 is a fantastic middle ground between Li-ion and LiPo—I made out like a bandit at the end of the Obama administration when all the green startups went be

LiFePo4 is a fantastic middle ground between Li-ion and LiPo—I made out like a bandit at the end of the Obama administration when all the green startups went belly-up; Chinese LiFePo4 cells were a dirt cheap and ubiquitous in California back then. I still use some of those cells to charge Lipo cells in the field.