Does anyone have problems with Optima red top batteries during cold temperatures? I have been experiencing problems during cold weather( sluggish starting around 20 deg F, and might as well forget about it when the temps are below zero). The truck cannot always be plugged in during these times. Both of the batteries have read good on a load test. I do not have any charging issues that I know of with the truck. The batteries are approximately 2. 5 years old. During warmer temps ( 30 deg and up) there are absolutely no problems cranking the engine. comments ... ... ... ... ... . ? #@$%!