The differences between lead-acid batteries and lithium-ion batteries on electric bicycles are quite apparent.

Cost:

Lead-acid battery systems can be several hundred or thousand dollars cheaper than comparable lithium-ion batteries.

Currently, the price range for lithium-ion batteries is between $5,000 and $15,000 (including installation costs), and this range may vary depending on the size of the required system.

Associated Costs:

The purchase and installation costs of lead-acid batteries are generally cheaper than lithium-ion batteries.

The cost component of lithium-ion batteries is higher; however, the lifespan value of lithium-ion batteries offsets this impact.

Energy Density:

The energy density of lead-acid batteries is much lower than that of lithium-ion batteries. Lithium-ion batteries have significantly higher energy density compared to lead-acid batteries.

Lithium-ion batteries can store more energy in the same physical space. Additionally, they can release more energy, providing power for a longer duration.

Discharge Capacity:

The discharge capacity of lead-acid batteries should not exceed around 50% as it can shorten the battery's lifespan.

Typically, lithium-ion batteries utilize 85% or more of their total capacity in a single cycle. Therefore, lithium-ion batteries have better effective capacity than lead-acid batteries.

Efficiency:

The efficiency of lead-acid batteries ranges from 80% to 85%. These batteries charge slowly and have lower effective battery capacity.

Most lithium-ion batteries have an efficiency of 95% or higher, meaning that 95% or more of the energy collected in the lithium-ion battery can be utilized. These batteries charge quickly and have a larger effective capacity.

Application:

Lead-acid batteries are well-suited for large-scale stationary applications where space is abundant and energy demands are low. In terms of cost and size, lithium-ion batteries may be the ideal choice for electric bicycles.

Environmental Friendliness:

Lead is a carcinogenic and environmentally hazardous substance. Even lead-acid batteries contain dangerous compounds like sulfuric acid. Lithium-ion batteries are more environmentally friendly as lithium is a harmless substance.

Which battery is best for electric bicycles?

For electric bicycles, lithium-ion (Li-ion) batteries are the best choice. While lead-acid batteries are still much cheaper, they are three times heavier than lithium-ion batteries.

Lithium-ion batteries are favored for their lightweight nature and suitability for long-distance travel. Compared to older battery technologies, lithium-ion batteries offer faster charging, longer range, and better power density, achieving longer battery life in lighter containers.

However, the five most critical variables to consider when choosing battery chemistry are specific energy, cost, lifespan, power, and safety.

What is the lifespan of an electric bicycle battery?

With proper maintenance, the battery lifespan can range from 3 to 5 years. Even when not in use, lithium batteries on electric bicycles will gradually lose capacity and self-discharge.

Even if the connected electric bicycle doesn't require any power or remains unused, the lithium battery on the electric bicycle will lose the stored energy due to internal actions.

Excessive self-discharge can cause irreversible damage to the electric bicycle's battery. Therefore, it is recommended to actively utilize it.

How Many Years Should An Ebike Battery Last?

Generally, a high-quality eBike battery may last between 3 and 5 years. Of course, this depends on various factors, including the type of battery,  and how well you maintain it. 

The major factors recommended for prolonging the e-bike’s battery life include the following:

Charge your battery completely for up to 4-7 hours before your first ride to extend its lifespan.

Use the original charger provided during the initial purchase with your e-bike; never mix and match chargers.

Do not wait until your e-bike battery is completely drained before charging.

Maintain your e-bike by charging it regularly and adequately.

Establish a charging station that is both dry and secure. Electrical gadgets should not be exposed to high humidity.

Learn your battery’s high and low voltage cut-off limitations.

Regularly clean around the battery connections and eliminate any corrosion.

Lithium batteries are the most prevalent battery in electric bikes nowadays.

Advantages Of Lithium Batteries




Disadvantages of lithium electric bicycle batteries

Advantages Of Lead Acid Batteries For E-Bikes

Disadvantages of lead acid batteries for e-bikes

Conclusion:

Which is better, lead-acid batteries or lithium-ion batteries? In most cases, lithium-ion battery technology is superior to lead-acid battery technology due to its advantages in reliability and efficiency.

If the electric bicycle is not used frequently, the cheaper lead-acid battery may be preferred. According to recent research, the lifespan of lithium-ion batteries in electric bicycles is 45% longer than that of equivalent-rated lead-acid batteries.