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I have had the same Supercheap Standard Duty Lead Acid battery since 2010. Constant charging and regular topups with demineralised water, have kept it going right to today. Cost me about $60 in 2010. Full-sized.
It has powered the LX200, plus all accessories including dew heaters, a laptop and camera and even a 12-volt hair dryer. It has also kept my phone or tablet charging, via added usb ports.
I saw and appropriated @Inmykombi's idea of mounting cigarette lighter plugs on to the battery, with an inline off switch. That one modification makes everything very fast and tidy. Next will be a battery housing box, as the cold does get to them, for certain.
Lately, I have added a small ride-on mower battery for the dew zappers. This one set me back $110, and barely even runs down from full, even on the coldest of nights. Still a hefty battery - certainly more than the little house alarm-style batteries that the power tanks and jump starters have in them.
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