Deep Cycle Marine/RV Battery The GPL-4DL is a high performance, Mil-Spec, AGM battery, produced in the United States. Due to the Lifeline Battery's quality construction, it has an industry leading 2% per month self discharge rate at 77°F (25°C), compared to 10%+ for conventional batteries. Coast Guard approved, DOT Haz Mat Exempt, and longer lifespans than conventional batteries. Warrantied installations include marine, yacht, and other seafaring applications.
GPL-4DL Charging Instructions and Voltages:
Bulk Charge Voltages: 14.20 - 14.60
Absorbtion Charge Voltages: 14.20 - 14.60volts
Float Charge Voltages: 13.10 - 13.40
The GPL-4DL is designed for charging amperages up to 210 amps or 100% of the rated Amp Hour Capacity due to low battery internal resistance.