How to recover or extend car battery life using battery desulfator with charger.

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The Extreme Max 1229.4028 2A Battery Charger Maintainer Desulfator is a multi-step onboard charger for your car boat RV ATV UTV and more! The charger is compatible with both 12 volt and 6 volt batteries and offers 2 Amps per charging bank. The charger offers three stages: Optimize Charge Force-Charge for Dead Batteries and Restore Battery.