5 Best Group 31 Deep Cycle Batteries in 2026: A Practical Camping Guide

The LiTime is a 12V 100Ah Group 31 LiFePO4 battery with a 100A BMS that guards against overcharge, over-discharge, short circuit and over-temperature. It weighs 22.05 lb, about a third of a comparable lead acid battery, and the listing claims 15000 or more cycles.

Against the AGM dual-purpose batteries, it gives full 100Ah use and a fraction of the weight, with no cranking claim in the listing. Compared with the flooded US Battery pair, it needs no watering and no venting routine.

It suits campers and van owners swapping a heavy Group 31 lead acid for a lighter house battery. The 5 year warranty and tech support add a layer of assurance.

The Mighty Max MM-G31M is a 12V 110Ah Group 31M AGM that lists 825 CCA, 1000 MCA and 240 minutes of reserve capacity. It is spill-proof, maintenance free and rated for up to 700 cycles at 50% depth of discharge.

Against the Weize it states a cycle rating, which gives a better view of its deep cycle life. Compared with the LiTime, it can crank an engine and run house loads at a much higher weight.

It suits truck campers and boat owners who want one battery to start an engine and run lights. The sealed design avoids acid leaks in a vehicle.

The Weize is a 12V 110Ah Group 31M AGM with 825 CCA and 240 minutes of reserve capacity for starting and deep cycling. Its listing highlights leak-proof construction, specialised safety valves and quick-charge capability at 14.4V.

Its price is the lowest in this comparison, and it matches the Mighty Max on cranking figures. Against the Banshee it lists a higher capacity of 110Ah and names a charge voltage.

It suits budget trucks and campers that need a Group 31M that can start an engine and power a few accessories. A sealed leak-proof case suits use in a vehicle.

The Banshee is a Group 31 marine deep cycle with top posts, 105Ah, 800 CCA and dual post terminals. Its listing says it replaces the Optima D31M 8052-161 SC31DM.

Against the Weize and Mighty Max it lists slightly less capacity at 105Ah and 800 CCA.

It suits owners replacing an existing D31M-style battery who want a direct match. The dual posts simplify mixed accessories.

The US31DC XC2 pair is rated 130Ah at the 20 hour rate with runtime ratings of 59 minutes at 75 amps and 225 minutes at 25 amps. It uses flooded lead acid cells with Diamond Plate Technology, dual SAE and bolt terminals and a heat-sealed polypropylene case.

Against the AGM dual-purpose batteries, it lists far more deep cycle capacity at 130Ah per battery and publishes runtime ratings. Next to the LiTime, it costs much more as a pair and weighs more.

It suits a fixed camper or cabin bank where long deep cycle life matters more than weight. Two batteries wired in parallel give 260Ah.