Cmax banks not holding charge

[Bass so loud it HZ]

I took my cmax banks out last weekend getting it ready for a wall they were at 15.3 . Tested then last night and one of my banks were at 1.5 v . I put some charge to it and it charges up but it is gradually losing voltage. I'm assuming I have some bad cells but curious whats the proper to tell which ones are bad or not ? TIA!

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[Doxquzme Premium Member]

Hmmm, taking a stab here. This assumes you can use (and own) a volt meter and can test the individual cell(s). Here is a link that might help.

How to Test Super Capacitors

How to Test Super Capacitors: Did you get a great buy on Ebay? Or was that "super deal" a "super dud". Have you duplicated one-to-many of the sketchy YouTube super capacitor videos? Or, maybe you have a capacitor bank that has been in service for a while and…

www.instructables.com