Harald Hansen
Explorer
rusty_tlc said:Slightly off topic but what about battery heaters?
I was helping my son with some work on his GF's Rav4 that came from Alaska. It had block heaters and a battery heater.
How much are batteries derated in low temps?
A lot! Enough that it is supposed to be worthwhile to let the battery heat itself with an electric element.
I've often wondered if a stick-on side mirror heater element would do as a battery heater.