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Battery fundies: What is wrong with this battery

gimme_power
in Batteries

Featured Replies

I have a fairly new 50Ah Gel battery, won't call out the manufacturer.  I should be able to get 20Ah out of it. I have charged it at 10Ah at 14.7V with a victron charger and it goes through all the cycles successfully.

When I put it under a small load, see attached data I recorded today, it seems that it is behaving OK but suddenly drops from +-12.6 to 8 Volt.  This happens after I only extracted +- 2Ah, so far away from it's supposed capacity.

 

 

WhatsApp Image 2023-03-10 at 16.33.00.jpeg

Edited by gimme_power

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