5.0 AH battery self discharge not occurring.

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  • Updated 2 years ago
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I have three 5.0 AH batteries that will not self discharge after being stored for 3+ months. The batteries preform normally in all other areas. I have had all three batteries for 15+ months. Any one currently have the same problem? I reported the problem to customer support once last
year, but never received a final resolution.
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William P Tucker

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Posted 2 years ago

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szwoopp, Champion

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I have 2 5.0 batteries for my snowblower.  I had them all charged and ready to go for the next snow which never came.  So I checked them the other day and 1 was at 30% and the other was at 100%.

Have not had a chance to call CS yet.

Also William it is a 30 day period (not 3 month) that should result in an auto discharge.
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William P Tucker

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Yes, I realize the self discharge should occur after a 30 day period. During the past 15 months I have checked the batteries at various periods starting at the 30 day period, then increasingly higher periods over 30 days.  At no time did the batteries self discharge. I found them always at 100%.
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Blue Angel, Champion

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Official Response
It’s worth noting that the self discharge process will take quite a long time to complete, probably a few days. The process happens by engaging a bank of resistors in the electronics. Current is passed through the resistors and the energy is shed as heat, but since it’s encased in plastic can only dissipate a very small amount of heat. The endcap is warm to the touch during this process.

Because of this, checking a battery on day 31 would not be advised, you’re probably safer checking it on day 40. Having said that, if a battery has been sitting for three months it should have discharged to 30%.
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William P Tucker

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I have left them as long as 6 months in storage. Still no discharge.
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JMack

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Hi William, I had the same issue with one of my batteries and EGO exchanged it under warranty. My case ended up going to their back-end team before they acknowledge the issue. Now both of my batteries start the discharge process after 3 months. 
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William P Tucker

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JMack, are you saying you had to wait 3 months before they started to discharge? They did not start after 30 days?