Suggestion: Keep it simple ... read and respond to what's written.
Example:
I said: "I've yet to pull the 4 UB12220 bank and charge it, *then test each
battery
separately,"* ... that means I will charge the entire 4 pack of batteries to
be sure they
all receive the same charge opportunity .... then disconnect them and check
what each
individual battery is reading. I don't know how to express it any clearer.

You wrote: "I think it would be worth checking individual batteries."
Which is what I said I am going to do.
Puzzling to me what you missed?
bob

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