While debugging a strange battery failure in a manufacturing process, [Josh] discovered a new (to us) LiPo battery failure mode. Different battery chemistries react differently to temperature.

Lithium-ion (Li-ion) battery technology has historically been the power cell of choice, especially given that we’re always all looking to maximize our smartphone’s battery life. However ...

Energy storage efficiency per unit volume is also low compared with modern lithium polymer (LiPo) batteries so all in all they don’t look all that useful for many of our projects. However ...