Reverse Polarity Battery? - Defender Source
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  #1  
Old June 22nd, 2016, 11:37 AM
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Reverse Polarity Battery?

I was at Batteries and Bulbs and they had what they called reverse polarity AGM batteries which the guy told me just meant the posts were switched. Is there any other difference between this and a regular battery? They were only $100 for the 775cca AGM which seemed like a hell of a deal.
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  #2  
Old June 22nd, 2016, 12:19 PM
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Was the name of the company "Batteries Plus Bulbs" ?
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  #3  
Old June 22nd, 2016, 12:23 PM
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That seems a bit misleading. Usually they are referred to as Reverse Terminal and the Battery code will have an 'R' in it (like Group 34R - for reversed terminals). If this is all they are referencing, should be no other difference in the battery construction/specs/etc..
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  #4  
Old June 22nd, 2016, 05:24 PM
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Click image for larger version

Name:	image-3159927550.jpg
Views:	103
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ID:	152397

Here was the product number.
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Old June 22nd, 2016, 05:25 PM
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Quote:
Originally Posted by rdavisinva View Post
Was the name of the company "Batteries Plus Bulbs" ?
Could be. It's the green and orange logo.

------ Follow up post added June 22nd, 2016 04:29 PM ------

So is it just me or does that seem ridiculously cheap? The non-R Coded batteries were the same price as a cheap optima red top, 170 range
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Old June 22nd, 2016, 05:37 PM
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The posts are switched??? Can't you jist spin the battery 180 and have the same thing?
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Old June 22nd, 2016, 06:42 PM
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The + and - are reversed relative to the side of the battery they are closest go. On batteries where the terminals are closer to one side of the case , the + and - will be opposite on the regular and 'R' models. No other diffs as far as I know. Doesn't matter if you cables reach, mount works, etc.
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Old June 22nd, 2016, 06:58 PM
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Quote:
Originally Posted by fishEH View Post
The posts are switched??? Can't you jist spin the battery 180 and have the same thing?
Many battery groups have the terminals near to one side, so turning the battery 180 degrees puts them on the other side.

I doubt any of this matters on a Defender. On most cars the wires won't reach.
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Old June 22nd, 2016, 08:15 PM
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technically an acid filled battery does not have polarity once fully discharged. it is my understanding you can reverse the polarity of the terminals by fully discharging and slowly recharge.
never attempted my self, but if such is done then the larger terminal which once was positive becomes negative. also, you can connect two batteries in series pos to neg and obtain 24 volts, or parallel pos to pos and obtain higher amperage while mantaining 12 volts.
somewhat off topic but good to know.
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Old June 22nd, 2016, 08:24 PM
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technically an acid filled battery does not have polarity once fully discharged. it is my understanding you can reverse the polarity of the terminals by fully discharging and slowly recharge.
You can but it will wreck the battery internals giving low capacity and short life as they are designed to work in one direction.
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Old June 22nd, 2016, 08:31 PM
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good to know...tx, now I know a second way to wreck a good battery other than fully discharge and recharge a couple of times..lol.
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Old June 22nd, 2016, 09:59 PM
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Quote:
Originally Posted by RockShow View Post
Attachment 152397

Here was the product number.
The local store in Norfolk, VA has them for $182.
Wonder what the amp hr rating is?
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Uncle "Richard" Douglas has a Land Rover with big wheels that never gets stuck... until he breaks something so it won't go. Uncle Douglas always breaks something. - Anna Crowther at the Conclave 2012 (AKA Carburetor Neck)

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  #13  
Old June 23rd, 2016, 12:14 AM
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This store was in Waynesboro, Va
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  #14  
Old June 25th, 2016, 11:19 AM
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I have two Odyssey batteries under my drivers seat. One is standard and the other has reversed polarity. The RP battery is mounted in such a way that one post is positioned under a metal brace. On a standard battery the hot post would be on that side and I didn't want any surprises if the hold down failed while I was driving off-road. The RP had to be special ordered directly from Odyssey.
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Old June 25th, 2016, 11:24 AM
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Quote:
Originally Posted by CMSgt Bo View Post
I didn't want any surprises if the hold down failed while I was driving off-road.
Good idea---I've seen how you drive over rocks! LOL



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Old June 25th, 2016, 12:05 PM
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Good idea---I've seen how you drive over rocks! LOL
Whatever do you mean?
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