Originally Posted By: chaosmagnet
In terms of safety, traditional Lithium Ion batteries (sometimes called LiPo, Lithium-Cobalt or LiCo) may not be suitable to store in a car. These batteries can go into thermal runaway at about 140 deg F, which the trunk of your car might reach on a hot summer day.

That's interesting. Is this for batteries sitting charged but static, as opposed to charging (traditionally the most dangerous mode) or discharging?