At what voltage is my 12 volt battery considered "dead?" Support December 10, 2020 19:08 Updated Follow A 12 volt DC battery is considered "dead" at 10 volts. Related articles Should I store my batteries fully charged or discharged? How long will my batteries last? CMM1200 Troubleshooting - Charge does not last Comments 0 comments Please sign in to leave a comment.
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