Deep Cycle Vs Lithium-Ion Battery: Which One Is The Best For Power Tools?

With improved technology, lithium-ion battery is trying to get a solid come back again with BAE, Narada, Sonnenschein, etc. So, the argument arises that is the newest lead-acid battery more energy-saving? Does it have a better capacity? What about its battery life?

We cannot forget that lithium-ion replaced lead-acid batteries because of its advanced technology, which was more energy-saving and better in many cases. The deep cycle has a discharge capacity of 80%, while the lithium-ion battery has the potential to discharge up to 100%.

This guide will portray an in-depth deep cycle battery vs lithium-ion comparison of all these features and more of the two batteries and which one you should choose.

What Is A Deep Cycle Battery? 

A deep cycle battery is a type of lead-acid battery which has been around for more than 100 years. The lead-acid battery has two systems. One of them is the VRLA, and the other is a flooded battery. 

Both of the systems sponsor the two types of batteries: The Shallow cycle battery and the deep cycle battery. Here, we will get familiar with the deep cycle battery.

A deep cycle battery is a lead-acid battery that is manufactured specifically to sustain power for a long time until it reaches 80% discharge. Manufacturers recommend discharge up to 45-50% to extend the lifetime. It is more common for marketplace or wider area uses.

The battery might look similar to a car battery, but it can provide a steady amount of energy for a long period. Not to mention its capacity to be discharged repeatedly.

This battery type is still on the verge of advancing because of its exceptionally low cost and amazing service. 

What Are The Common Uses Of A Deep Cycle Battery?

The deep cycle battery is used for those applications that prefer a sustained level of power for a long period than a short burst of energy while starting. It is commonly used in:

  • Cathodic protection in marine uses
  • For working as a power generator in small boats and water vessels.
  • Used for forklifts and floor sweepers in industrial uses.
  • Off-grid power storage for solar and wind power in small installations
  • For traffic lights
  • Recreational vehicles
  • Uninterrupted Power Supply for computer and its associated equipment

What Is The Lithium-Ion Battery?

The lithium-ion battery is a conceptually deep cycle battery that it can be charged fully and then discharged again. The lithium-ion battery concept was first introduced in the 1970s, and it became widespread by the 1990s.

The life cycle of this battery extends with each discharge up to 80% extent. It has an exceptionally good efficiency along with a high voltage.

However, this type of battery is quite expensive, which is easy to overlook because of its amazing features.

What Are The Common Uses Of Lithium-Ion Batteries?

Because of their lightweight nature, lithium-ion batteries have a variety of uses, irrespective of size. These include:

  • Use of lithium-ion battery in portable devices like mobile phones, game consoles, laptops, smartphones, torches, etc.
  • It can be used in electric power tools
  • Lithium-ion is more suitable for electric vehicles.

Lithium-Ion vs Deep Cycle Battery: The Comparison

Take a peek at the comparison below before jumping in the descriptive guide-

FeaturesDeep cycle batteryLithium-ion Battery
Energy density(Wh /L)80-100250-693
Specific energy(Wh/L)40150
Discharge Efficiency50%80-90%
Temperature sensitivity Can tolerate temperature above 25oCSensitive to a temperature above 450C
Voltage range 2V3.7V
Regular Maintenance NoNo 
Cost ($/ kWh)120600
Charging time8-16 hours2-3 hours

Voltage Range and stability

The lithium-ion battery has a voltage of 3.7V, while the voltage range of the deep cycle battery is roughly 2V. 

However, a higher voltage range is not the only thing that makes the lithium-ion battery stand out from competitors. The stability of the voltage is also worth mentioning.

The lithium-ion battery has a 100% stable voltage, while the deep cycle battery has a slopping voltage. That is, the voltage will waver constantly.

Discharge efficiency

The deep cycle has a discharge capacity of 80% and can range up to 50-95%. However, according to its various manufacturer, if you want to extend the lifetime of the battery, you should let the discharge hit below 45-50%.

In the case of the lithium-ion battery, it is a stable battery with great efficiency. This battery has the potential to discharge up to 100%. Here, we can say that the discharge quality of lithium-ion batteries is far better.


The lithium-ion battery has a lightweight configuration which makes it perfect for transforming from one place to another. 

Not to mention, this quality is the reason why lithium-ion batteries can be used even in the smallest devices, irrespective of their size.

The deep cycle battery, on the other hand, looks more like a car battery. It has thicker plates for discharging deeply, and its overall arrangement makes it heavier. 

Thus, we can conclude that lithium-ion batteries are more lightweight than deep cycle batteries. We can estimate that it is more or less 30% heavier than the lithium-ion battery.

Charging time of the batteries

The deep-cycle lead-acid battery can handle a charge rate of 0.2C, which is 10 times its capacity, and it needs at least 100A current for charging. Anything more than that, the battery will overheat and can slow down the charging time.

It can easily handle overcharging of the battery by forming the by-product hydrogen. 

On the other hand, the lithium-ion battery can handle a charge rate of 0.5C that is 5 times its capacity. It can handle 250A of current. 

The lithium-ion battery has a hard time tolerating overcharging of the battery.

That is why it needs external devices to support overcharging, overheating, and overvoltage. Overall, all these devices make it more expensive. 

We can settle that the Li-ion battery requires less charging time.


The deep cycle battery has a lower cost than that of the lithium-ion battery. Not to mention, the initial per kWh cost of the deep cycle battery is very low comparatively.

Safety and Environmental Impact

The lead electrolytes of the lead-acid battery are very harmful to the environment that entitles a long-lasting impact on the environment. On the other hand, the lithium-ion battery is a safer and cleaner technology.

Which One Should You Choose: Deep Cycle Vs Lithium-Ion Battery?

Depending on the overall discussion above, we can observe that both the batteries are good in their way.

Even though deep cycle batteries have a size restriction for the devices, the lithium-ion battery could be used everywhere.

It cannot tolerate overcharging, but it has a good energy capacity and is overall a great battery. It is a bit pricey, but it is worth every penny.

the other, a deep cycle battery is preferred for its low price.

It is also a good battery all in all. Well, it completely depends on you which one you want to choose.

Why should we settle for a deep cycle battery?

If you are looking for a battery that will serve you for a long period, then it is better to use a deep cycle battery.

It doesn’t have those short outbursts at the start and work efficiently.

You can use it for wider and larger devices like forklifts, marine vessels, etc.

Some Recommended Deep Cycle Batteries:

This battery has 1150 CCA with 4-year full replacement warranty. It is suitable for extreme temperatures and offers fast recharging. With up to 400 cycles to as low as 80 percent discharge, it comes with 70% longer life than conventional deep cycle batteries

This battery comes with an electrolyte suspension system and heavy duty plates. As being an AGM battery, these are resistant to shocks and vibrations, and maintenance free. The charge lasts for 10 hours with 50-60% depth of discharge

Why Should We Settle For A Lithium-Ion Battery?

The lithium-ion battery has a lifetime of 3-10 years with a duration of 400-1200 cycles. Thus, we can say that the battery has good durability.

Some Recommended Lithium-Ion Batteries:

This batterydelivers consistent run time in severe temperatures. The Integrated L.E.D. Battery charge level indicator is there to monitor battery charge. It gets to full charge in 45 minutes or less and provides up to 65% more run time per charge.

This battery offers faster motor turnover and better starting with 12.8v power and 360 Cranking Amps. This lightweight battery is high-quality and easy to handle.


Did you go through the ultimate battle of deep cycle battery vs lithium-ion battery? We have tried to mention everything you need to know about the two batteries, as well as their descriptive comparison.

Both the batteries are equally great in their perspective. Despite that, only the user can choose which will they prefer better, the lithium-ion battery or the deep cycle battery. 

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