Those little diesel heaters have my attention. I think they burn 0.1l/hr or something equally miniscule like that. That equates to 1/2 gal. IMP /day...
I will mention some of the devices you can use to restore a battery will send high frequency AC pulses into the battery. The idea is the pulses will...
In my mind, I always hear this analogy and I never come away satisfied. And I'm not saying there's anything wrong with changing a filter every time....