Lifeline

Lifeline makes AGM batteries that are widely used on cruising boats and RVs. eMarine carries Lifeline deep cycle batteries in common group sizes, including GPL-24T, GPL-27T, GPL-31T, GPL-31XT and GPL-30HT at 12V, GPL-4DL and GPL-8DL large 12V units, and 6V GPL-4CT, GPL-6CT and GPL-L16T batteries for series banks, plus GPL-1400T, 2400T, 2700T and 3100T starting and dual-purpose batteries.

How to choose Lifeline batteries

• Deep cycle or starting: deep cycle for house banks, starting models for engines.
• Group size: match the battery box (24, 27, 31, 4D, 8D, GC2, L16).
• 6V or 12V: pairs of 6V batteries in series often give more capacity in the same space.
• Charging: set chargers to the AGM profile recommended by Lifeline.

Why choose AGM over lithium?

AGM is sealed, maintenance-free and works with most existing charging systems at a lower upfront cost. See our battery guide.

Where can I compare lithium options?

See marine batteries.