Lithium-Ion vs. Lead-Acid Forklift Batteries

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Lithium-Ion vs. Lead-Acid Forklift Batteries

Lithium-Ion vs. Lead-Acid Forklift Batteries Oct. 14, 2023

Lithium-Ion vs. Lead-Acid Forklift Batteries

Forklifts are ideal for multiple jobs, especially when moving heavy loads more efficiently and quickly across your work environment. A forklift battery is what supplies the necessary power for these machines to allow them to meet the needs of your applications.

Two primary battery types are used in forklifts — lithium-ion and lead-acid. Each battery has distinct benefits for different applications. Learn more about the difference between lithium-ion forklift batteries versus lead-acid batteries. 

What Is a Lithium-Ion Forklift Battery?

Lithium-ion batteries for forklifts are rechargeable graphite and lithium batteries with low discharge rates and high energy density. A forklift lithium-ion battery is more lightweight than lead-acid batteries, though they still require machinery to move. Since these batteries weigh less, you may need to add a metal plate to prevent your forklift from tipping over when carrying heavy loads.

Lithium-ion forklift batteries may have a higher purchasing price than lead-acid batteries but can have lower maintenance costs, which can offset the initial purchasing price. These batteries can also be charged faster, so you can charge them during breaks. 

What Is a Lead-Acid Battery?

Lead-acid batteries are rechargeable and have a higher power-to-weight ratio. These forklift batteries are often sought after for their lower price. Lead-acid batteries for forklifts are typically the standard in many industries due to their capabilities and low cost. When you buy an electric forklift, they often come with lead-acid batteries. 

Despite the low purchase price, lead-acid batteries have several long-term expenses, including weekly maintenance and a dedicated space for charging when you use them for multi-shift operations. These batteries also need regular cleaning and watering, requiring a specialized watering system, trained personnel, and safety equipment.

Lead-acid batteries weigh more than lithium-ion batteries, which is essential in some applications. Forklifts can carry particularly heavy objects and sometimes need something to balance the weight. These batteries can prevent forklifts from tipping over when carrying heavy loads.

Lithium-Ion vs. Lead-Acid Forklift Battery Benefits

Each battery has unique advantages that make them better suited to some applications than others. Below, you’ll learn about the different benefits of each battery type and a few of their potential drawbacks:

Benefits of Lithium-Ion Batteries

Lithium-ion batteries aren’t the standard for forklifts, but more industries are switching to these batteries for a good reason. Some of the benefits of these options include:

  • Reduced maintenance: Lithium-ion batteries have a higher purchasing price, but they require less maintenance than lead-acid batteries, which can help save on cost.
  • Quick charging capabilities: Lithium-ion batteries can charge faster than lead-acid batteries. You can even charge these batteries during breaks rather than having to wait for them to reach a full charge. 
  • Longer life span: Lithium-ion batteries have a longer operational life than lead-acid batteries, making them a more worthwhile investment for some industries. 
  • High performance: These batteries have consistently high performance and voltage, which helps maintain consistent power for the forklift.

Lithium-ion batteries also have some factors to consider before committing to them as your final choice. For example, these batteries have higher upfront costs and less weight to use as a counterbalance for heavy forklift loads, often requiring a metal plate.

Benefits of Lead-Acid Batteries

Lead-acid batteries come with most forklifts, making them the standard for many applications. These batteries have some unique benefits, including:

  • Cost: Lead-acid batteries have a more affordable purchasing price compared to lithium-ion batteries, which can be more cost-effective for some businesses.
  • High energy density: Lead-acid batteries have a high energy density, making storing large quantities of energy in small spaces easier.
  • Durability: Lead-acid batteries are designed to be more robust, making them capable of withstanding hard working conditions and environments. These batteries can withstand shocks, vibrations, and extreme temperatures.
  • Recyclability: Lead batteries are 100% recyclable, which makes them a great way for businesses to improve their sustainability practices. 

While lead-acid batteries have some considerable benefits, there are also some drawbacks to consider when deciding between the two. Lead-acid batteries have extensive maintenance requirements, heavier weight, longer recharge times, and limited life spans.

Lithium-Ion Forklift Batteries vs. Lead-Acid: Which is Best for You?

The best type of battery for your forklift will depend on your applications. Lithium-ion batteries require less maintenance and have a faster charge rate, longer life span, and more significant return on investment, while lead-acid batteries are more affordable, especially if you only need to use them occasionally.

Lithium-ion forklift batteries may be better if running multiple shift applications with several forklifts. Lead-acid batteries may be more cost-effective if you only occasionally use a few forklifts rather than as part of your everyday operations. 

Factors to consider that can help you make a decision include:

  • Length of service life: Lithium-ion batteries have a longer life span, meaning they won’t need to be replaced as regularly as lead-acid batteries. However, if you don’t use your forklifts often, a lead-acid battery can meet the need of your applications. 
  • Maintenance and labor requirements: Lead-acid batteries have more lengthy maintenance requirements and long charge times. You’ll need to have trained personnel to ensure you can get the most out of the life span of your lead-acid batteries. If you have fewer untrained personnel and don’t have the proper equipment to perform weekly maintenance on your lead-acid batteries, you may be better off choosing a lithium-ion battery.  
  • Existing forklift equipment type: Look at your forklift model and specifications, such as the battery compartment size and voltage. Your existing equipment will determine what type of battery is best suited to your applications. 
  • Battery compatibility with your forklift applications: Look at your forklift’s hours of operation, travel distance, load weights, and typical lifting heights. Understanding the applications of your forklift can help you choose a battery that meets your needs and performance goals. 
  • Environmental temperatures: When lead-acid batteries charge, they can become hot, meaning you should only charge them in temperature-controlled spaces.

Contact Thompson Lift Truck for Quality Lithium-Ion Forklift Batteries

If you want to use lithium-ion batteries for your forklifts, Thompson Lift Truck can help. Our high-quality lithium-ion batteries are the best option for industries looking to get the most performance out of their batteries. Our batteries are proven to perform in the toughest conditions and have a more robust life span and efficiency. 

Thompson Lift Truck is a supplier of lithium-ion forklift batteries for businesses in Georgia and Alabama. Our expert team can help you find the best battery for your forklift and applications. Request a quote today to get started!

Forklift Battery Types: Which Is the Most Economical?

Most warehousing operations will use one of two main forklift battery types: lithium-ion batteries (Li-Ion) and lead-acid batteries. Of these two options, which is the most affordable forklift battery?

Broadly speaking, lead-acid batteries are less expensive to buy upfront but may well end up costing you more over five years, while Li-Ion has a higher upfront purchase price but is potentially more cost-effective in the long run. 

If you're wondering which option is right for you, it all depends on what your operational needs are.

Read on to find out how each type of forklift battery is used, their different benefits, and what you need to think about before you decide which option is right for you.

Related read: Key Questions You Should Consider Before Buying Your Next Forklift

What are lead-acid batteries?

Invented in 1859, lead-acid batteries are known as the more traditional battery type. They’re a tried and tested solution in the material handling industry and have been used for decades in forklifts and elsewhere. They utilise the same technology many of us have in our cars.

A lead-acid battery that you buy now is a little different to one that you could have bought 50 or even 100 years ago. The technology has been refined over time, but the fundamentals haven’t changed.

Download now: Checklist: 5 Ways to Prepare Your Warehouse for Electrification 2030

What are lithium-ion batteries?

Invented in 1991, Li-Ion batteries are a much newer solution. Mobile phone batteries utilise lithium-ion, and Li-Ion can be recharged much faster than other commercial battery types. 

Lithium-ion batteries are best known for their environmental benefits, as they use 30% less energy (contributing towards a lower TCO (total cost of ownership)), are quick to charge and can be opportunity charged, and have a longer battery life than others.

While they are more expensive than lead-acid batteries upfront, Li-Ion batteries are more cost-effective to maintain and use. Even though the initial investment is higher, some businesses could save money in the long run due to the lower operational and maintenance costs.

A note on nickel-cadmium

A third type of forklift battery exists: nickel-cadmium. However, they are costly and can be difficult to handle. They’re ultra-reliable and are right for some businesses, but for most, lead-acid or lithium-ion will prove more economical.

Lead-acid batteries in the warehouse

Where a business is operating multiple shifts, a fully-charged lead-acid battery will be installed onto each truck at the start of the shift on the understanding that it will last for the duration. At the end of the shift, each forklift battery will be removed for charging and replaced by another fully charged battery. This means that each forklift battery has enough time to be charged again before the next shift begins.

Given their lower cost to purchase, this means that lead-acid batteries can be a more economical choice for businesses with a single-shift operation.

Batteries will work throughout the shift without a hitch, and when operations finish they can be easily charged, and ready for the next day.

For multi-shift operations, using a lead-acid battery will be less economical. You will need to purchase and maintain more batteries than forklifts to ensure that there is always a fresh battery available to be loaded while the previous forklift battery is charging.

If you are running three eight-hour shifts, then you’ll need three batteries for each truck you’re operating. You’ll also need plenty of space to charge them and people available to put them on charge.

Lead-acid batteries are bulky and heavy, so taking the batteries out of each electric forklift and charging them adds an extra job to each shift. And because they contain acid, lead-acid batteries need to be handled and stored with care while charging.

Related read: Lead-Acid or Lithium-Ion: What's Powering Your Warehouse?

Lithium-ion batteries in the warehouse

Li-Ion batteries are designed to stay in the forklift – they do not need to be removed for recharging. They can also be charged throughout the day, so when an operator stops for a break, they can plug their truck in to charge and come back to a recharged battery capable of running for the remainder of the shift. A lithium-ion battery can gain a full charge in one or two hours.

They work exactly like a mobile phone battery. If your phone battery drops to 20%, you can charge it for 30 minutes and, while it won’t be fully charged, you can still use it properly.

Lithium-ion batteries usually have a much smaller capacity than the equivalent lead-acid battery. A lead-acid battery might have a capacity of 600 ampere-hours, while a Li-Ion battery might only have 200.

However, this isn’t a problem, because a lithium-ion battery can be quickly recharged throughout each shift. Warehouse operatives will need to remember to charge the forklift battery every time they stop work. There is a risk that, if they forget, the battery will run out, taking the truck out of action.

If you use lithium-ion batteries, you’ll need to make sure you have space in the warehouse for trucks to recharge electric forklifts throughout the day. This usually takes the form of designated charging points. Staggered break times can help manage this process so that not all staff are trying to charge their truck at the same time.

Lithium-ion batteries are therefore the more economical option for warehouses running 24/7 operations or multiple shifts back to back, because fewer forklift batteries are required compared to lead-acid types and batteries can be opportunity charged, enabling operators to run electric forklift trucks indefinitely around their breaks, increasing productivity and boosting efficiency.

Related read: How Electrification Can Enhance The Efficiency of Material Handling

How long does a forklift battery last?

Lithium-ion batteries usually last for 2,000 to 3,000 charge cycles, while lead-acid batteries for 1,000 to 1,500 cycles.

That sounds like a clear win for lithium-ion batteries, but if you have multiple shifts, with lithium-ion batteries being charged regularly throughout each day, then the life of each battery will be shorter than if you were using lead-acid batteries that are removed and swapped at the start of each shift.

Lithium-ion batteries are lower-maintenance than lead-acid batteries, which can mean they last longer before they reach their end of life. Lead-acid batteries need to be kept topped up with water to protect the lead plates inside them, and they will become damaged if they are allowed to get too hot or too cold.

Download this free guide to discover how to assess your application requirements, balance acquisition and fuel costs, and understand the different types of material handling equipment currently available. Which is the most economical forklift battery for your operations?

Which is the most economical forklift battery for your operations?

The cost of each type of battery needs to be worked out around your operations’ needs, budget and circumstances. If you have a single-shift operation, a low forklift count and space to charge batteries, lead-acid might be more economical. If you have multiple shifts, a larger fleet and little space or time to deal with removing and recharging forklift batteries, lithium-ion might work out more cost-effective.

Li-Ion batteries can be recycled, but the process is a lot more involved and potentially more expensive than the likes of lead-acid. When considering the option to recycle lithium-ion batteries, customers are advised to inquire with their suppliers regarding their established recycling programmes. It is expected that any reputable supplier would have a well-defined system in place, with the possibility that the associated costs may not be passed on to the end user.

This is something to consider when deciding on the battery type you use to power your forklift(s). Conversely, nearly 100% of lead-acid batteries can be easily recycled, making them the leading battery when it comes to sustainability for many operations.

Regardless of the battery you choose for your electric forklifts, the benefits of electrification are numerous — from reduced fuel costs and reduced TCO, to lower CO2 emissions and less maintenance. 

Importantly, when investing in a forklift battery you’ll be prepared for upcoming regulations in 2030 which forbid the sale of new gas, diesel, and hybrid-powered vehicles in the UK. 

To get more information about these regulatory changes and ensure that your warehouse is prepared, download our free checklist: 5 Ways to Prepare for 2030.

The utilisation of lithium-ion battery technology has grown exponentially in recent years, as the material handling world becomes more aware of the benefits of this sustainable power source. 

Which is the best battery for your Forklift?

Choosing the best battery for your  electric forklift truck can be quite a challenge. There are a lot of factors to consider. This blog hopes to help you get more insight into the batteries used in the industry now and how to determine the best battery for your truck.

Let us look at the two batteries available in the market for your forklift truck and learn more about them.

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