Shirley I use a 12AH gel battery to power my AZEQ6, weight is maybe 5kg like a counterweight. No issues ruining it for a couple of nights. This, charger and a simple wiring harness made on the spot at Batteryworld cost of the order of $60-70.
The big question is whether you want to power other stuff such as dew heaters, camera or laptop which can be quite power/hungry.
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