My tip for the day is to re-purpose long appliance cords for battery chargers/tricklers & task lighting. (weld much?)
Cords from old vacuum cleaners are long and durable (fiber reinforced). Long pool pump and electric pressure washer cords must be vetted for cold weather flexibility (HFT-anything, btw) or be planned to be left in place as alt to outlets, etc.
All 'wet' batteries will self-discharge when sitting, Gel/SLA the least but they still will. Anything that sits for weeks at a time deserves something. A car/truck battery that's run 2x/wk will far outlast a tractor battery (o'sized for svc life, considering common use) that's run 2x/mo. Life expectancy is proportional to time spent topped up, period.
btw, I have six or so tricklers, and Battery-Minder 1500/1510 is my #1. (YMMV) Dual-battery trucks get maintainers rotated weekly whether equipped with isolator (F-450) or separate/spare (Chev 2500 HD). I'm rotating six chargers/tricklers/maintainers between > a dozen batteries in vehicles and three spares in waiting. (also for trolling motor & 15 gal 12v sprayer) A $50 gizmo that'll > dub'l the life of three or so $100+ batteries is just Scottish of me.