Double check that the individual battery is reverse charged. Isolate the battery. Discharge it with a resisti e load, like a car headlamp. Put it on a 6v charger to see if it will recover.
-------- Original message --------
From: Mike Finck via Elec-trak <elec-trak@cosmos.phy.tufts.edu>
Date: 4/22/23 10:24 AM (GMT-05:00)
To: elec-trak@cosmos.phy.tufts.edu, noaddress@drmm.net
Subject: Re: (ET) battery gases
Sirs,I am on an "old man" streak . Turns out I installed one of the batteries (lead acid) backwards and charged the pack for about 6 hours and of course had no real power. Studied the installation and found the problem (me)! I disconnected it but now I am uncertain of my next step. With red tester lead on + post and black on - post shows "6.2v", reversing the leads shows "-6.2v" so I'm thinking the polarity did not reverse. Should I charge it separately for awhile or just reinstall it among the pack and start charging (and thank my lucky stars)?