Ben Spray Posted January 16, 2009 Share Posted January 16, 2009 Hi all. Need a new battery on my 90, have just fitted a Warn 8274 up front which will be used for self recovery and a bit of garden work, pulling stumps etc, no comps etc just pay and play. What do I do, either replace with something like this which I guess would give decent starting and a fair power reserve for the winch: http://www.leisurebatteryshop.co.uk/item-N...0MCA-I3694.html or am I better off running 2 batteries and a split charge system, like 2 of these with an X-eng split charge relay (benifits would be more power for the winch and less likely to flatten the starter battery - but how likely is that with my intended usage??) http://www.leisurebatteryshop.co.uk/item-N...0MCA-I3126.html Or do I buy 1 out of the 2 86ah ones now and upgrade later to split charge if I find I need it (an option which I dont think is possible with the larger battery due to lack of space under the pasenger seat??? although Im at work now and havent measured...) Never that sure about split charge systems after the relay on my 101 locked closed somehow and totally killed both batteries while it was sitting... Cheers Ben Quote Link to comment Share on other sites More sharing options...
bishbosh Posted January 16, 2009 Share Posted January 16, 2009 For the minimal winching you propose I would suggest one battery and a good condition alternator will be fine. Get the biggest battery you can find at your local auto factor and you should be good to go for about £50. No point shelling out on fancy batteries for what you are proposing (in fact there's no point shelling out on fancy batteries full stop in my opinion!!) Quote Link to comment Share on other sites More sharing options...
flatback90 Posted January 16, 2009 Share Posted January 16, 2009 step forward mr x-eng..... Quote Link to comment Share on other sites More sharing options...
Mark90 Posted January 16, 2009 Share Posted January 16, 2009 I'm with Bish on this, a 663/664 is about a big as you can get in a 90 seatbox and has plenty of umph (fitted to a lot of commercial stuff), probably about £60-70. Quote Link to comment Share on other sites More sharing options...
Ben Spray Posted January 16, 2009 Author Share Posted January 16, 2009 Hi Yeah Im replacing a 664 which has just died, wasnt sure it would be up to winching (albeit light useage) weirdly the one I have isnt that old, levels are ok, looks clean inside no plate damage or white stuff, charger will charge it and cut off within an hour or less after taking it off the 90 but put it on the 90 and it wont even start it... Thought perhaps it was the starter motor so I took a battery off my car (just a small regular car battery) and it started instantly so guess the battery has some internal damage of some sort. Cheers Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted January 16, 2009 Share Posted January 16, 2009 Don't fit any sort of 'deep cycle' battery. They should be called 'slow, deep cycle' batteries. They're intended for gradual drain over longer periods of time. Winching imposes large current spikes, like a starter motor (granted, longer 'spikes' than starting), so you are far better off with starter batteries. Quote Link to comment Share on other sites More sharing options...
Mark90 Posted January 16, 2009 Share Posted January 16, 2009 Yeah Im replacing a 664 which has just died, wasnt sure it would be up to winching (albeit light useage) I had a 664 in my 90 with 5ish hp motor on an 8274 and it was fine even doing the odd winch challenge event. CCA and capacity is about 150% of standard LR battery so a good jump up and plenty for light winching, and without any complications* of a split charge unit. * Yeh I know a split charge is hardly complicated Quote Link to comment Share on other sites More sharing options...
Ben Spray Posted January 16, 2009 Author Share Posted January 16, 2009 Cool Im sold then guys cheers, will grab a replacement 664 weirdly Ive just put that old battery on my car and it fires that up fine but not the 90 (wheras the cars battery will fire the 90 up) - car is a 4 litre v8 jag so hardly easy to start I wouldnt have thought, 90 is a 200tdi.. Cheers Ben Quote Link to comment Share on other sites More sharing options...
clbarclay Posted January 16, 2009 Share Posted January 16, 2009 For recreational use the standard 69 amp hour battery on my V8 RRC (goodness knows how old an tired it is) is surficient for the EP9 on the front. I've only once flattened it winching and that was about 5 minutes constant winch through a wet hole where for a while all 4 wheels where submerged. Quote Link to comment Share on other sites More sharing options...
stravaigin Posted January 16, 2009 Share Posted January 16, 2009 Cool Im sold then guys cheers, will grab a replacement 664weirdly Ive just put that old battery on my car and it fires that up fine but not the 90 (wheras the cars battery will fire the 90 up) - car is a 4 litre v8 jag so hardly easy to start I wouldnt have thought, 90 is a 200tdi.. Cheers Ben 4 ltr V8 (petrol?) 200tdi- diesel. petrol engines have a lower compression ratio compared to diesel (roughly 10:1 compared to roughly 20:1 for diesel), also 8 cylinders compared to 4, as soon as one fires at takes the load off the starter/battery. I have an old diesel forklift battery that could no longer do its job but starts my lightweight first go. Quote Link to comment Share on other sites More sharing options...
Ben Spray Posted January 16, 2009 Author Share Posted January 16, 2009 Ahh, I had my logic back to front then, I was thinking yes petrol half the compression but twice the cylinders = same but now I see ;-) Cheers Ben Quote Link to comment Share on other sites More sharing options...
steve_d Posted January 17, 2009 Share Posted January 17, 2009 Before you condemn the battery get a battery supply place to do a load check on it. Basically this is just a controlled and metered short circuit on the battery and will prove it dead or otherwise. Steve Quote Link to comment Share on other sites More sharing options...
sbkenn Posted February 6, 2009 Share Posted February 6, 2009 There are devices called "charge balancers" for split systems. Then(within reason), you can treat the batteries as independent as long as the appliances electrics aren't grounded. If they are, one lead to earth, and the other to battery/s, 12 or 24 Quote Link to comment Share on other sites More sharing options...
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