I have had an XD8000 hooked up to side posts on my redtop for years. Winch wasn't used often, but never any problems. A few weeks ago I did some hard pulls, bogging the winch down. When I moved that winch from one Jeep to the other the + side terminal had melted a bit on the batt. Bottom line, put the winch cables on the top terminals on the batt. Batt still works fine, but it melted it trying to pull a tree out of the road, so I can imagine it would ruin a batt with any extended heavy pulling.
85 CJ7 258, borla header, Team Rush, MC2100 ,optima batt, Warn 8274, agr super box 2 & pump, T5 w/ B&M shifter, centerforce 2, superior 1 piece axles, warn hubs 2.5 in lift, 31" BFG MT
I think we need to make a sticky about Optima batteries and the user comments about them - the Cliff's Notes version:
They're overpriced, Poor quality, and highly overrated. The Side terminals may work for extras like lighting (within reason), mild stereo setups, and a great power source for that bunch of switches to run all those relays for the aux lights, OBA, headlight upgrades, etc...
If you want a good winch battery, read that link Lucdog posted. The Short version:
A good Heavy Duty lead-acid flooded battery rated for commercial or heavy farm use. For the best set-up, 2 batteries isolated until needed..
Oh, and good cables rated for the current, not the cheaper smaller-gauge wiring that you get with the winch.
1978 CJ5 5.0HO/T177/D300, '86 D30/D44 WT axles, 'glass body, 31x10.5 BFG A/T, TDK galv'd frame - DD and weekend toy