Optima D34M 5/16 post

[Dune Buggie Junior Member Find all posts View Profile Close Dune Buggie]

Hi all, I have a single battery set up and just replaced the old wet cell battery with a optima blue top, does anyone know the max amp rating on the 5/16 posts.
I was thinking of connecting my warn M9000 winch to these post but not sure if they will take the load. I've read somewhere from another post that it's not advisable on a yellow top, but was thinking that the aux post on a blue top are closer to the main post they may have a higher rating. Can't find any info on the Internet.
Thanks Rob

[craigm Addicted PP Member Find all posts View Profile Close craigm]

I've got an Optima D27M and have my Magnum 9K Winch running via the same size (5/16) posts and have had no issues to date.

[D4D Addicted PP Member Find all posts View Profile Close D4D]

Whilst people do it, Optima recommends not to. I have an email from them somewhere.

Edit - here it is

Winches should always be connected to our SAE posts and not the threaded post. The threaded posts are intended for starting your vehicle which, although high current, is a short duration electrical load. A winch is also high current but can be very long duration. Using a winch connected to the threaded post could damage the connections in the battery, it can melt the side terminals right out of the battery housing. Only use the SAE (automotive type) terminals for connecting your winch.

[craigm Addicted PP Member Find all posts View Profile Close craigm]

Thanks for the heads up D4D. I have checked (touched) the terminals after winching and whilst they were a little warm, nothing alarming. Might swap them over just to be sure...

[Dune Buggie Junior Member Find all posts View Profile Close Dune Buggie]

Thanks for the fast reply guys, sort of thought that. good to get clarification.

[D4D Addicted PP Member Find all posts View Profile Close D4D]

Yeah I'd say you'd need a pretty hard/long winching effort to do damage but best to err on the side of caution.