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Lifeline GPL-4CT Marine AGM Battery

Lifeline GPL-4CT Marine AGM Battery
Lifeline GPL-4CT Marine AGM Battery


Lifeline is a true US family-owned company, with roots deep in the soil of U.S. Defense. In fact, the company started producing lead-acid batteries over more than three decades ago. The RV and marine industry got some reliable batteries from this company. Therefore, Lifeline Marine GPL-4CT AGM Battery is one of the finest masterpieces of them.

However, it is a 6 volts AGM battery. On the other hand, it works well with RV, solar applicants, and marine. In this Lifeline Marine GPL-4CT battery review, we will discuss some important features and specifications of this battery. Furthermore, we added the tip to maintain it for long use.

A Little Background of the Lifeline Marine GPL-4CT Battery

The AGM battery was developed in 1985. It was designed for military aircraft. The prime consideration for design it was for weight, reliability, power, and reliability. Thus, the most important benefit is that it doesnt need any maintenance or watering. At the same time, the battery is sealed. Technically, it is a lead-acid battery. The AGM battery charges more than 20 percent faster.

Specs at a Glance

  • CCA: 1095 @ 68° / 925 @ 32° / 750 @ 0°
  • Voltage: 6 voltages
  • Item Weight: 66 pounds
  • Item dimension: 10.28 x 7.06 x 9.92 in
  • Reserve Capacity.
  • @ 25 Amps – 492
  • @ 15 Amps – 856
  • @ 8 Amps – 1692
  • Bulk Charge Voltage: 7.10 – 7.30 V
  • Float Voltage: 6.55 – 6.70 V
  • Enclosure: ABS Plastic




For Whom the Lifeline Marine GPL-4CT AGM Battery  is Designed For

As the name indicates, this battery is specially designed as a marine battery. However, it stands for multipurpose. People who are looking for high performance, industry-leading battery at a modest price this one are perfect for them.T

  • It is Suitable for Solar applications.
  • If you are looking for a battery with updated technology, this one is a perfect choice.
  • Perfect choice for your RV.
  • It is for those who want something reliable at a reasonable price.

Lifeline lifeline gpl-4ct battery Feature


  • Need minimal maintenance.
  • CCA rating is high up to 710.
  • The price range is quite Affordable.
  • It is useful for both Float and Cycle Use.
  • It is Spill Proof/ Leak Proof.
  • Impressive 2 percent industrial leading with self-discharge rate at 77°F.


  • Without any technical support.
  • It is pretty bulky

The Noteworthy Features of the Lifeline Marine GPL-4CT AGM Battery

Lifeline AGM batteries‚ review will be incomplete without mentioning its awesome features. It pretty obvious that you want to make sure the battery has all required feature. Thus, the Company never compromise with the quality. Let’s see, some remarkable features of this 6v AGM deep cycle battery.

Mil-Spec Certified

The very first feature we like to introduce is it is U.S. Mil-Spec certified. So far it can endure severe vibration and shock. Thus, it works great from extreme heat to polar ice. However, Mil-Spec is a military standard by the U.S. Department of Defense. Furthermore, Mil-Spec is approved when the item meets a certain requirement.

Unrivaled Safety

The next noticeable feature we like to introduce is its unrivaled safety feature. Not only that, it gives incomparable safety if it has over-charging situations.  Not only that, it produces below 2 percent hydrogen gas by volume.  Point to be noted, 4.1 percent is needed for flammability in the air.

Impressive Discharge Rate

Lifeline gives nearly 1,000 cycles at the discharge rate of 50 percent. Thus, the rate is crucially higher than the wet cell. On the other hand, the gel battery provides nearly 300 to 450 cycles. Another feature we like most is its faster recharge rate.

Long Lifespan

Another great feature of this Lifeline AGMs is its longer lifespan. Thus, the typical lifespan of this battery is 5 to 8 years. If you can maintain it properly, it can last up to 10 years. However, this range is quite higher than any other competitor.

No Sulfuric Acid Leaks

Where most of the battery is made up of the sulphuric acid solution, this battery is out of it. Sulphuric acid is highly toxic as well as corrosive. Therefore, you don’t have to handle the leaking problem. That means more power in the same space. However, keep in mind; sulfuric acid leaks need extreme care for safety reasons. Meanwhile, the sulfuric acid battery has to keep away from pets and children. So this no acid clean up feature is surely a big advantage.

Amazing Warranty Offer

Lifeline offers one of the excellent offers in the industry right now. It comes with a one-year free replacement. At the same time, it comes with a 5-year pro-rated replacement. Besides this, the company is a reputed position. Thus, Lifeline serves its batteries as OEM over the U.S. as well as international companies. On the other hand, Lifeline never compromises quality.

Maintenance Tips

  • Never leave or store your batteries in a position 80 percent charge.
  • If you use it without charge on a repeated basis, this won’t last more than two or three years.
  • If is shows the loss of capacity signs, don’t fret.
  • Equalized the battery more often. However, it’s a great recovery tool.

FAQs for the Lifeline Marine GPL-4CT Battery

A: Yes, Lifeline gives a one-year replacement. At the same time, it comes with a five-year pro-rated warranty.

A: For best use, we recommended an inverter with the battery.

A: It is a multipurpose battery.  You can run Microwave, TVs, vacuum household style and a lot of light.

Alternative Products 

Still not satisfied with this one? Want to look something relevant? Don’t worry. The market is flooded with lots of batteries which give a great performance. So let’s see some other options.

If you are on tight budget, still want the same quality of that Lifeline battery then this one will be great for you. It spills prove battery, gives added protection. This safeguard battery gives 20X more vibration protection. More about this choice on Diehard 38232 Advanced Gold AGM Battery.

2. Odyssey PC680 AGM Battery

The very first thing we liked about this product is its long life cycle. Beside this, it got the highest recharge efficiency. Rather than this feature, this battery is Vibration resistant. With almost 16 pounds, it is pretty lightweight.If you want to chose another Odyssey Battery, you also read Odyssey 34M-PC1500ST Battery review.

3. Delphi BU9034 MaxStart AGM Group 34 Battery

Cost effective Group 34 battery with 775 CCA (cold cranking amps) and 120 R.C. (reverse capacity).  Superior vibration resistance, optimized component compression and fortified posts, straps and welds.

Wrapping Up

When it comes to picking the best AGM battery for marine use, we always recommend  Lifeline Marine GPL-4CT Deep Cycle battery. We assure you Lifeline always maintain quality. Thats why they are the market leader for over three decades.

However, it’s an amazing battery with the longest lifespan. Besides this, it’s a heavy-duty, versatile power battery. Point to be noted, never leave your battery below 80 percent charge. We hope you enjoyed our article and it will be helpful on your next buy. To wrap this Lifeline Marine GPL-4CT battery review up, we could say it is one of the best Lifeline batteries on the market right now. Thanks for being with us.