Reviving Dead Batteries
As long as there is still active material in the battery and the plates aren't shorted, any battery that fails due to lead sulfate crystallization has a chance of being revived and reused. This is not only limited to car batteries, but to ALL lead acid batteries!
There are already battery clinics now that revive and recondition batteries, which are later sold back to customers at about 1/3 the retail value of a new battery. These batteries are given 6 month replacement warranties!
The graph below shows a typical revival process of a 45 Ah Ca-Ca battery that had failed 2 years ago due to shelf sulfation. Note how the impedance and CCA (Cold Cranking Amperes) are inversely related. The CCA of the battery, initially at 112 increased gradually up to 321. The battery was originally rated at 360 CCA, and it takes about 180 CCA to crank a car.
In this particular example, the battery was revived in approximately 6 hours or so. Do note that not all batteries can be revived in such short periods of time. The speed of revival depends on the degree of sulfation the battery suffers from. Revival can take up to weeks if a battery is badly sulfated as more time is needed to break the lead sulfate crystals.
As Good As Almost New
Reviving Maintenance-Free Calcium Batteries
Articles · Battery Maintenance & Care · Why Batteries Die · How Lead Acid Batteries Sulfate · Reviving Dead Batteries · Why Not EDTA? · Battery Pollution Prevention · Proper Battery Handling · Jump Starting Your Vehicle · How Long Can I Park My Vehicle? · Battery Specific Gravity · How To Maintain Your Golf Cart Batteries · Troubleshooting Golf Cart Batteries · Solar Energy & Renewable Energy Sources · Getting Your Battery Ready For Summer
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