Lifeline Battery
About Lifeline Battery
Lifeline Battery is one of the most respected names in AGM (Absorbed Glass Mat) battery technology, built on a foundation of aerospace-grade engineering and American craftsmanship. Lifeline Battery is the consumer-facing brand of Concorde Battery Corporation, a family-owned U.S. manufacturer with roots going back to 1972 and more than four decades of battery manufacturing and distribution experience.
What truly sets Lifeline apart from mass-produced alternatives is how each battery is made. Lifeline batteries are individually hand-crafted from start to finish and built to military specifications — the same standards Concorde applies to its aerospace aviation batteries. That aerospace heritage translates directly into real-world durability: sealed, spill-proof construction, superior vibration and shock resistance, and an industry-leading self-discharge rate of just 2% per month compared to 10% or more for conventional batteries.
Aerospace Technology for Marine & RV Use
Lifeline's success in the marine and RV markets is no accident. The technology and manufacturing processes behind every Lifeline AGM battery are the same ones used to power aircraft and U.S. Military vessels. Lifeline batteries have been approved by the U.S. Coast Guard, are DOT Haz Mat Exempt, and have been deployed across multiple branches of the Armed Forces. For boaters and overlanders who demand reliability far from the nearest service dock or electrical hookup, that pedigree matters.
The proprietary lead-oxide paste developed by Concorde engineers is a key contributor to the batteries' exceptional performance. Unlike other manufacturers, Concorde fully seals the edges of polyethylene separators — one of the most common failure points in competing AGM batteries — and makes all inter-cell connection welds extra robust for easy quality inspection. The result is a battery that consistently outlasts and outperforms conventional flooded lead-acid and gel-cell alternatives.
Marine Batteries
Lifeline's marine battery lineup covers deep-cycle house applications, motor starting, and dual-purpose configurations across a wide range of group sizes. Whether powering onboard electronics on a coastal cruiser or delivering cranking power on a working vessel, Lifeline AGM marine batteries charge up to 20% faster than conventional batteries and require zero maintenance with proper charging. The GPL series — including popular models like the GPL-31XT, GPL-4DL, and GPL-4CT — are produced in the USA and backed by an industry-leading 5-year warranty with a one-year free replacement period.
RV Batteries
For recreational vehicle enthusiasts, Lifeline offers deep-cycle AGM batteries in 2V, 6V, and 12V configurations that can be wired in series and parallel to meet virtually any power system requirement. Lifeline RV batteries are even standard equipment on EarthRoamer expedition vehicles — a testament to their ability to handle the most demanding off-road and remote-power scenarios. Fully sealed and mountable in any orientation, they deliver consistent performance across extreme temperature ranges without the need for watering or routine upkeep.
Expanding Beyond Marine & RV
While marine and RV applications remain the heart of the Lifeline lineup, the brand's AGM batteries are also trusted across a growing range of industries — including mining, oil and gas, photovoltaic solar systems, electric vehicles, and standby/backup power installations. Lifeline Batteries maintains distribution networks across the globe and manufactures from two U.S. facilities, one on each coast, ensuring broad availability and fast fulfillment for dealers and end users alike.