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Can a Dead Battery Be Reconditioned?
“Dead” describes a symptom, not a diagnosis. Some discharged batteries can be recharged; some degraded batteries may respond to supported conditioning; others have failed.
First identify why it is dead
Discharge, sulfation, charging-system problems and internal failure are different conditions. Treating them as the same problem leads to bad decisions.
Do not attempt recovery on damaged batteries
Do not DIY-recondition a battery that is cracked, leaking, swollen, frozen, severely overheated or otherwise physically compromised.
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