Can You Use A Deep Cycle Battery In A Car? The Deep Cycle Battery Guide

A deep cycle battery is not the same as a car battery. It is designed to be discharged repeatedly and withstand more discharge cycles than your average lead-acid battery.

This makes it perfect for use in RVs, boats, and other applications requiring frequent power discharging. A deep cycle battery will never provide enough power to start your vehicle as a traditional automotive starter battery would. But can you use a deep cycle battery in a car? Read on to find out.

What Is A Deep Cycle Battery?

A deep cycle battery is a lead-acid battery designed to provide power for equipment over an extended period. This differs from starting batteries, used primarily to start engines and not intended to be discharged regularly.

While there are different deep cycle batteries available today, their chemical process remains the same as the traditional lead-acid battery. Deep cycle batteries are often used in golf carts, electric boats, and recreational vehicles.

They can also be found in backup power systems for homes and businesses. Unlike starting batteries, which have a much higher voltage but a shorter life span, deep cycle batteries provide a steadier current flow over an extended period. This makes them a better choice for applications that require a consistent power supply.

Can You Use A Deep Cycle Battery In A Car?

Yes, you can.

Deep cycle batteries are commonly used in RVs, boats, and other vehicles. These batteries can be charged using solar panels or generators to power the vehicle engine or other devices on board.

However, it is not recommended that you use a deep cycle battery for powering your car directly as it will drain quickly! This means that you will be reducing the lifespan of the deep cycle battery significantly.

You should use a car battery to power your vehicle’s motor instead of a deep cycle battery, as it will drain the latter much more quickly! Car batteries are designed for short-term usage and high energy output, while you can use the deep cycle ones repeatedly without being drained too significantly.

For example, you could charge your boat batteries with a solar generator and use them to power your boat. However, if you were using these batteries in a car, they would drain much more quickly than usual.

Factors To Consider When Buying A Deep Cycle Battery

Here are a few things to keep in mind while shopping for your new deep cycle batteries:

Price: the price of a battery is one of the main factors to consider when buying. Batteries can range in price from $50 to $200 depending on the size and type.

Capacity: another essential factor to consider is the battery’s capacity. This is measured in amp-hours (Ah) and tells you how much energy the battery can store. The higher the Ah rating, the longer the battery will last.

Type: there are two main types of batteries – flooded and sealed lead-acid (SLA). Flooded batteries need to be periodically topped up with water while SLA batteries do not.

Size: when choosing a battery, you need to consider the size and shape of the battery. Batteries come in all shapes and sizes, so you need to find one that will fit your needs.

Brand: not all batteries are created equal. When choosing a battery, be sure to choose a reputable brand that has a good reputation in the market.

Warranty: a warranty indicates quality, so be sure to choose one with an extended warranty period. It will minimize potential problems down the line and give you peace of mind.

Disposal cost: when it comes time to dispose of your old battery, make sure there are no hidden costs involved in doing so.

Cycle life: this is the number of times a battery can be charged and discharged before it needs to be replaced. It varies from one brand to another, so check with your dealer for more details on which batteries have higher cycle lives.

Many factors need consideration when buying new deep cycle batteries. In addition to price, capacity, and type, you also need to consider the size of your battery.

In addition, be sure to choose a reputable brand with a good reputation in the market and is willing to stand behind their product with a warranty period if something goes wrong.

Deep Cycle Battery Vs. Normal Lead-Acid Battery: What Are The Differences?

A deep cycle battery is a type of lead-acid battery specifically designed for use in applications that require repeated discharges, such as portable power tools, electric vehicles, and uninterruptible power supplies.

Regular lead-acid batteries are not designed for this type of use and will not last as long if discharged repeatedly. Deep cycle batteries are typically more expensive than regular lead-acid batteries, but they offer a longer lifespan and handle more abuse.

Most deep cycle batteries are six cells, while most normal lead-acid batteries have only three cells. This makes deep cycle batteries heavier and larger than normal lead-acid batteries.

Normal lead-acid batteries are mainly used to power cars and trucks as starter batteries, and they will provide a short burst of high current.

Deep cycle batteries are designed to be used time after time for something like an RV or solar system where the battery is constantly being drained and recharged. They are also used on boats a lot.

Another difference between a deep cycle battery vs. a normal lead-acid is the life span. Deep cycle batteries are designed for prolonged use and can last up to five times as long, depending on usage. On average, a deep cycle battery will last around four years or 800 cycles before it needs replacing, while an average starter battery (used in cars) only lasts for around two years or 400 cycles.

When it comes to recharging, you can charge a deep cycle battery much slower than a normal lead-acid battery without damaging the battery. You should not charge most deep cycle batteries at more than C/20 (where C is the battery’s capacity in amp hours). You can charge normal lead-acid batteries at C/100 or more without any problems.

Deep Cycle Battery FAQs

Is there any benefit in using two smaller capacity batteries instead of one larger capacity battery?

No, this is not recommended. If two batteries are used in parallel, their voltage remains the same, but it will cut their amperage capability in half, which means that they would both take twice as long to recharge.

When camping, do I need an alternative charging source for my deep cycle battery (e.g., generator, solar panel)?

Yes. Deep cycle batteries are designed to be repeatedly charged and discharged. Repeatedly charging your battery from a vehicle’s alternator will cause the battery’s life expectancy to significantly decrease over time due to heat build-up in the battery compartment.

Is it okay if I leave my deep-cycle power supply turned off for a while (e.g., over the winter)?

No, it is not recommended to leave your deep-cycle battery turned off for an extended period as this will cause the battery to lose its charge and may eventually damage the battery. It is best to store your battery in a cool, dry place when it is not in use and recharge your battery at least once a month.

Can I use my deep cycle power supply as an inverter for household appliances (e.g., blender, vacuum)?

No, it is not recommended to use any kind of DC current device with this type of battery because they are designed to deliver high currents over short periods. A DC device would quickly discharge the battery and cause it to heat up.

Can I use my deep cycle batteries in a gasoline generator?

Yes, this is possible but not recommended due to the high amp draw of these appliances, which will cause your small-sized battery bank to become depleted very quickly. It is best to purchase an automotive-sized generator with a higher power output to ensure that it will be compatible with your deep cycle batteries.

Can I use my car battery in a gasoline-powered outboard boat engine?

No, this is not recommended as automotive batteries are designed to deliver high currents for short periods, which would quickly damage an automotive-sized boat motor requiring significant repair. It is best to use a deep cycle battery specifically designed for marine applications.

What is the difference between a flooded lead-acid and a sealed lead-acid battery?

A flooded lead-acid battery contains liquid electrolytes, which you must maintain at the correct level to prevent damage to the cells. If this level falls below the plates, then sulfation can occur.

A sealed lead-acid battery contains a gel or absorbed electrolyte, which will not evaporate even if the battery is completely discharged. This battery is maintenance-free and can be safely stored in any position.


Can you use a deep cycle battery in a car? Yes, you can. The deep cycle battery is designed to be discharged and recharged over time, which means it’s often used in things like golf carts or backup power systems.

If you need a high-capacity battery that can provide quick bursts of energy for short periods, the car starter may suit your needs better than this type of battery. You want one that offers low current but lasts longer, so it doesn’t die on you when you’re stranded somewhere without an outlet nearby.

Recent Articles


Related Stories

Leave A Reply

Please enter your comment!
Please enter your name here

Stay on op - Ge the daily news in your inbox