Costco Deep Cycle Battery

Costco Deep Cycle Battery – Everything RVers Want to Know!

Before you purchase any deep-cycle backup battery for your recreational vehicle, it is essential to know all about these batteries, so that you end up making a right choice. As you know, with so many brands designing batteries for the car, trailers or RVs, it has become very difficult to find the ideal alternative deep-cycle battery for the vehicle.

Therefore, people out there, who are searching for the optimum battery at the most attractive prices, should look for the Costco deep cycle battery. However, if you want to attain all the relevant information about the deep-cycle batteries before you get at the Costco store. Then here you will find all that you would like to know about the energy storage units.

What is Costco Deep Cycle Battery?

Associated with the concept of renewable energy, deep-cycle batteries are lead-acid batteries in which a chemical reaction generates voltage and develop electricity. These energy storage devices discharge 45%-75% of their capacity. In fact, these batteries can also function, when left with 20% energy storage. So, if you wish to receive a steady power rate for a longer period while you are out on a road trip in RV then, the deep-cycle battery is the ideal solution for it. Moreover, these RV batteries can be recharged many times, after they are discharged while performing several cycles.

On the flip side, Costco is the retail company that provides these deep-cycle batteries to the users at a lesser rate than the price of the battery charged in the usual market-store.

Structure of Deep Cycle RV Battery Costco

The deep-cycle batteries are generally categorised into two main types: Flooded batteries and Valve-Regulated Lead-Acid Batteries. These two main classes are further sub-categorised into two main types, as mentioned here:

Deep cycle battery operation
Structure of Costco deep cycle battery

Flooded Batteries (FLA)

  • Tubular-plated Opzs
  • Flat Plated Batteries

Valve-Regulated Batteries

  • Absorbed Glass Mat Batteries
  • Gel Batteries

With an abundant supply of different types of Costco deep cycle battery, there is one thing in common that is the internal structure. Let’s see what it actually constitutes:

1. Plates (both negative and positive)

These plates try to increase the release of electric gas and reduce the self-discharge volume. And, the main material used in the manufacturing of the plates is lead, calcium, and alloy.

2. Electrolyte

It conducts electricity by acting as a stimulating material between the positive and negative poles of the battery. They make it using pure sulphuric acid mixed with special additives and highly pure water.

Different poles of Costco deep cycle battery
Electrolyte of Costco deep cycle battery

3. Dummy Plate

 This dummy plate absorbs all the reserved electrolyte and prevents the occurrence of short circuit between the positive and negative plate. To manufacture it, the experts make use of high-quality glass fiber.

4. Terminal

Its function is to improve reliability by increasing the discharge magnification. Easy to connect with the battery’s contact pin, this terminal is made using aluminum alloy.

5. Pole confinement

Its main function is to prevent the leakage of acid from the battery. And, for this purpose, a special coloured sealing is used where red illustrates the positive pole and black depict the negative pole.

6. Shell and its Cover

The function of this component is to maintain sufficient mechanical strength so that it can hold the pole clusters consisting of different plates. The materials required for this part are inter-polymer synthetic resin, Propenyl cyanide or bivinyl, and butadiene styrene.

7. Emergency valve

Its main function is to maintain the normal pressure inside the storage battery by preventing the acid mist from going out and oxygen from entering the battery. In case, the atmospheric pressure inside the battery is above the defined value, this valve will open to let the gas move out of the energy storage unit. Made with excellent and high-quality rubber, this component allows is responsible for the longevity of the battery.

Applications of Costco Deep Cycle Battery

With so many great properties, this Costco Deep Cycle Battery has many applications. For example, we can use it in motorized wheelchairs, recreational vehicles, traffic signals, sailboat etc.

Properties of Costco Deep Cycle Battery
Properties of Costco Deep Cycle Battery

5 Best Costco Deep Cycle Batteries

Now, after knowing all the technical aspect of deep cycle batteries, it’s time to look for some of the Deep Cycle RV Battery Costco, which are ideal for the system.

1. ML35-12 – 12V 35AH U1 Deep Cycle AGM Solar Battery


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Firstly, this rechargeable battery has a sealed lead acid with dimensions of 7.68 x5.16 x7.13 (in inches). It is actually a spill proof battery with wide operating temperature, high discharge rate, and long-life. Besides this, it covers all safety features and resists vibration and shocks.

2. Expert Power EXP12180 12 Volt 18 Ah Rechargeable Battery

ExpertPower EXP12180

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This user-friendly battery has rugged construction and AGM technology, making it work at extreme temperatures. Besides offering strong shock and vibrant resistant material, this battery type is sealed using bolts and nuts. So, if you wish easy installing battery for your RV then, this one is for you.

3. Windy Nation 12V 100 Amp-Hour AGM SLA Deep Cycle VRLA Battery

WindyNation 12V

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Ideal for off-grid power, a lot of customers use this Costco Deep Cycle Battery for RV’s, telecommunication, portable tools, and UPS. With the reserving capacity of 240 minutes, this energy storage unit has 99.995% of pure lead that generates extremely low discharge rates. It has a life of approximately 10-12 years if maintained at ideal room temperature. Besides this, it yields 100 AMP-Hours at 10-hour rating.

4. 12V 55Ah Power Boat Pontoon Electric Trolling Motor Deep Cycle Battery

12V 55Ah Power Boat Pontoon Electric Trolling Motor Deep Cycle Battery

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With the dimensions of 9.02 x 5.43 x 9.13 (in inches), this energy storage unit is rechargeable and can be mounted in any position. Moreover, for safety, this deep-cycle battery resists all types of shocks and vibration.

5. Vmaxtanks Vmaxslr125 AGM Deep Cycle 12v 125ah SLA Rechargeable Battery

Vmaxtanks Vmaxslr125 AGM

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Made from military custom grade plates, these Deep Cycle RV Battery Costco has a lifespan of 8-10 years. Following all safety measures, this battery doesn’t emit any dangerous gases or fumes.

Some hacks to fix Deep Cycle Battery!!!

After knowing all the important aspects and types of Costco Deep Cycle Battery available in the market, if you want the battery to run for a longer time then, you should store it in a cool and dry place. Or, else it would accelerate the discharge process, eventually killing the battery.

Last Updated on May 25, 2019

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