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Lifeline 12v 105 AH Deep Cycle Sealed AGM Battery - GPL-31T


Due to current demands these batteries have an average lead time of 8-10 weeks after order. Please submit a quote request for an updated estimate and to process orders to reserve stock.

Batteries ship from various warehouses and usually deliver within 5 to 7 business days.

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Product InformationStore Part Number: GPL-31T


The Lifeline GPL-31T 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). These batteries off gas only 2% by volume under normal operating conditions, again, industry leading. No sulfuric acid leaks, no acid clean up, and more power in the same space when compared to conventional batteries. 

Lifeline Batteries are manufactured in West Covina, California by the Concorde Battery Corporation and is a US family owned and operated company. The Lifeline Battery technology is a direct spin off from Concorde's industry leading aerospace battery lines. All of these batteries satisfy the rigorous demands from many branches of the US Military and a host of industrial and private sector applications.

Coast Guard approved, DOT Haz Mat Exempt, and longer lifespans than conventional batteries. Warrantied installations include marine, yacht, and other seafaring applications. 


  • AGM design yields excellent Deep Cycle service Performance rating
  • Industry Leading 2% per month self discharge rate at 77°F (25°C)
  • Maintenance Free
  • Float and Cycle Use
  • AGM design may offer greater reliability in extreme use applications
  • Leak Proof/Spill Proof
  • Manufacturer Covered Warranty - See Chart Below


Typically AGM batteries DO NOT require a special battery charger as charge requirements are similar to Wet Cell or other types of Maintenance Free batteries. If you are in unsure about the charger you need please contact one of our technical advisors.

Batteries ship from various warehouses and usually deliver within 7 working days. Discount quantity pricing available please contact us by email or by phone during business hours.

Warranty Period: Free Replacement Months Pro-rate Months
Marine & RV application 12 60
Electric Vehicles3 6
All Electric Machinery0 3
All other Applications 3 9

*Shipping does not include fees for highly rural location, hard to reach locations, islands or location requiring ferry's. These locations may be subject to additional shipping fees. You will be advised prior to your order being processed if additional fees are required, at which point you may proceed with the order if accepted.

Tech Specs

  • Dimensions (LxWxH): 12.9 x 6.75 x 9.27 in
  • Weight: 64 lb
  • Shipping Weight: 68 lb
  • DC Output Voltage: 12 V
  • Bulk Charge Voltage: 14.20 - 14.60 V
  • Absorbtion Charge Voltages: 14.20 - 14.60 V
  • Float Voltage: 13.10 - 13.40 V
  • Enclosure: ABS Plastic
  • Model: GPL-31T
  • Manufacturer: Lifeline
  • Regulatory Approval: DOT, ICAA, IATA, IMDA
  • BCI Group: 31
  • C.C.A.: 880 @ 68° / 750 @ 32° / 600 @ 0°
  • Amp/Hr: 105 @ 20HR Rate
  • Reserve Capacity: 195 min @ 25 A / 340 min @ 15 A / 688 min @ 8 A
  • Warranty: Varies See Chart Below
  • Manufacturer Part #: GPL-31T
  • Made In: USA

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Reviews and Ratings

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Rated 5.00/5 Stars from 1 customer reviews.

Do you own the GPL-31T? Please, tell us what you think about it. It helps us provide you with better products. Please note that it may take up to 72 hours for your review to appear.

The Sole Cyclable AGM Battery On The Market
Pros: I am a retired lead acid battery design engineer (not from Concorde). The Lifeline's positive plates are almost twice as thick as any competitor's positive plates. That translates to cycle and maintenance Lifespan. Concorde, manufacturers batteries for commercial and private aircraft. Concorde manufactures batteries for the USAF and Naval aviation. Only quality and reliability influences their decision. Concorde publishes a definitive care and maintenance PDF owners manual. No one has offered me one cent re-numeration for this review.
Cons: The cost of the Concorde Lifeline turns off some folks. I am a cheapskate when it comes to purchasing batteries and I pay the same price as do you. I prefer batteries that are 100% made in the USA.
In my long life, I have enjoyed fifty dollar dinners that were worth every cent.

I have also suffered five dollar dinners that were a ripoff.

VALUE is the key to "Buying Smart"
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Written by on Sep 21, 2017. Ownership: When it goes, I'm giving it a eulogy. Knowledge Level: Genius is my way of life — (37 of 43 customers found this review helpful

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Specification Sheet

Material Safety Data Sheet


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