13500lbs winch - max size battery to fit tray?

I cannot comment on the Jimny as I don't have a winch on it. My old SJ competition truck had a 9000lbs winch and a single battery.
I never had a problem with it. As far as I am aware all the vehicles in my class (mostly LR defenders) all run single battery.
The Pro trucks are running multiple batteries but most are running 2/3 winches, overvaulted at 24V. Unless you are winching for hours
each day I think a single battery will be fine. I am no expert on winches or electrics and my reply is based on real world observations.

This is the battery i have at the moment...



Says 45ah 400A so should be ok for now with a view to something better when i find one that fits in the space properly

Thanks all for the advice!

Im not sure anyone said you need a dual battery setup... One is so much less hassle than 2 , just needs to be fit for purpose...
Running at 24v has the advantage of needing only half the current !

Lets rewind to the beginning "what size battery do i need to power the winch ?"
Answer, one with at least 650 CCA ! as stated by your literature
A stock circa 330cca jimny battery when brand new and in perfect condition will be a lot less cca now...
Lead acids are volatile and can explode... massively overload it as you could do and see what happens..

Riccy was after advice. Basically you will not get a battery that is sufficient for that sized winch to fit in the stock battery tray.
As also stated by suzuki, the max you should run is 70 amps, the no load draw from the winch.


Just seen your pic, that is a 400cca battery... that is actually a lot more powerfull in terms of cca than most 45 a/h batterys !
Still barely half the needed minimum though..

PS, i love a good debate, dont take it personally anyone !

I know its a bit of an side issue but why go for 13500 lbs winch for a jimny? 8000lbs will pull a Defender
that is twice the weight.

1066Boy wrote: I know its a bit of an side issue but why go for 13500 lbs winch for a jimny? 8000lbs will pull a Defender
that is twice the weight.

was a good price...

A mate had bought it for a defender, but then crashed before getting it fitted. i got it plus loads of accessories including 2x snatch blocks and tree strop, etc, all as-new for £350

1066Boy wrote: I know its a bit of an side issue but why go for 13500 lbs winch for a jimny? 8000lbs will pull a Defender
that is twice the weight.

Since ive a 13000lb i will give you my answer..... Price!
I could buy the winch with dynema cheaper than any 8000lb with steel cable !
Its well overkill, but will never have to double the line for a stronger pull !
The ebay add says 47kg, which worried me a bit as adding even more weight to a vehicle that was designed to be light..
I weighed mine and it weighed 27 kg !

I pulled a disco out of a bog hole that a landrover 90 with a rope could not even budge... So 1200kg of jimny pulled out around 2500kg plus whatever forces of mud acting on it yet i didnt get dragged towards it ? makes me really wonder what kg of force would be needed to drag a jimny along while you have your foot on the brakes.. ?