Why Tesla's are bad at towing!

I'm sure you all remember nicad batteries. They were a huge step up. But they had some serious flaws, particularly the "memory effect". Unless they were discharged all the way each time--and then fully recharged. Then came nickel metal hydride, a step up--but dendrites remained a problem, solution--charge slowly as you can stand. Now we are at LI. About their only problem is still the dreaded dendrites. As far as I can understand (I may be wrong), that is why they can't be recharged at low temperatures.

The latest LI technology has a "solid" electrolyte. Dendrites may not be an issue any longer.

There are also room temperature sodium batteries with a similar solid state electrolyte.

These last 2 have about 2.5 times the watt-hour capacity of current LI jars.