Battery Shelf life - Yamaha FJR Forum : Yamaha FJR Owners Forums
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post #1 of 6 (permalink) Old 08-07-2020, 08:03 PM Thread Starter
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Battery Shelf life

Hi all, quick question,. I have a battery that I bought for my dearly departed 900f. It has been sitting on a shelf for years but I never added the acid. Is this thing junk? Thanks in advance.

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post #2 of 6 (permalink) Old 08-07-2020, 08:46 PM
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I'd say if you never added the electrolyte it is good. I'm assuming you didn't add anything else and the cells are dry.

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post #3 of 6 (permalink) Old 08-07-2020, 10:25 PM
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Nothing to lose... I don't see why it wouldn't work at least to a very high percentage of it's capacity. Add the acid, slow charge at least overnight... at whatever rate they recommend, usually 1.2-2 amps..

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post #4 of 6 (permalink) Old 08-07-2020, 10:51 PM Thread Starter
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Agreed

I agree, can't see how it would be diminished but a quick google search didn't yield definitive results. Thanks guys.

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post #5 of 6 (permalink) Old 08-08-2020, 08:00 AM
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Should be like new ! But like Ray suggested I always put a new battery on one of my battery tenders to let it charge to full slowly at least overnight, seems to help with the life. I also tend to keep things on a battery tender when not being used, definitely gives better battery life.
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post #6 of 6 (permalink) Old 08-08-2020, 01:49 PM
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The reason they ship batteries without acid (“unactivated”) is specifically for maximum shelf life.

As has already been said, slow charge for 6 hours or more before use. Yuasa has a tech note stating a freshly activated battery will start your engine but will last much longer if “broken in” on slow charge rather than immediately hammered by the full force of vehicle charge system.

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