Originally posted by nafanja
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I charge my batteries until they reach at least 14.5V or more. After that I start cycling them by discharge/charge processes.
60AH battery should hold charge longer than that. It may be still sulfated and doesn't have sufficient capacity. Glass density meter for electrolyte makes good indicator of such.
Try to keep charging longer until battery reaches at least 14.5V. Let it rest and make a note of its resting voltage. Discharge and make a note of time frame. Let it rest and charge again. You can also connect one clip of voltmeter to one of the terminals and use a piece of bare wire attached to the second clip. Now you can probe each cell starting from the terminal to determine the weak one. There are 6 cells and each should read above 2V.
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