my advice: get a propane tank

given that he hasn't been open to solar suggestions in this thread or the one russian linked i'm assuming its an environment where electrical heat is the only safe option.

Yes correct Electrical is the only sfe method atm. Unless I use a minature propane tank like a vaporizer would. No I have not used drill batteries yet. I have not used any battery yet. Was simply asking about them.

oh okay. the thing is that 200watt rating isn't concrete most of the time so knowing its true power consumption under normal circumstances is going to be the best way to find the small acceptable battery.

if you have one or know someone with a digital multimeter you can use it to test amp draw then multiply that by 12 and you'll know how much power its actually drawing

so 200 watt figure we are going on could realistically be more around 120 which cuts the battery size down a lot.

hdmi cord?