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AutoMeter 12-Volt Battery Extenders

4.0 out of 5 stars 11 Customer Reviews

These Battery Extenders from AutoMeter are designed to maximize the life of a 12V battery. They charge a battery at a 1 amp rate until it is fully charged, and then change to a 250 milliamp current to maintain a full charge. This prevents sulfation, the main reason for premature battery failure.

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