7 differences between lithium-ion and lead-acid batteries

Lithium-ion battery pack

Lithium-ion batteries are composed of multiple 2200mAh battery cells, allowing for different capacitances. The cells are connected either in series or in parallels, and spot-welded to a protection circuit that provides overvoltage, undervoltage, and overcurrent protection.

Lead acid battery

Lead-acid batteries are the oldest type of rechargeable batteries and have been the standard for decades. They can contain gel, flooded or AGM (absorbed glass mat) cells.

Should you consider switching to a lithium-ion battery?

Lithium-ion battery pack for all-in-one solar street light application

Cycle Life

First of all, rechargeable lithium-ion batteries have a lifespan of 2000 to 5000 charge cycles, compared to 400 to 500 cycles for lead-acid. Cycle life is significantly influenced by discharge rates, which are different in lead-acid and lithium-ion batteries.

Performance

Lithium-ion batteries maintain the same amp hour rate while charging and discharging. Lead-acid batteries lose amp hours while charging and discharge rapidly, which reduces their efficiency.

Discharge Rate

Lithium-ion batteries can discharge completely, whereas lead-acid batteries should not discharge to under 80% of their capacity. It is recommended to never let a lead-acid battery discharge to under 50% of its capacity.

Voltage

Lithium-ion batteries maintain the same voltage throughout the whole discharge cycle, allowing for greater and longer lasting efficiency. In lead-acid batteries, voltage drops throughout the discharge cycle.

Weight

Lithium-ion batteries weigh about one-third of what lead-acid batteries weigh.

Cost

Rather, lithium-ion batteries cost more upfront, but they are more efficient and last much longer than lead-acid batteries, ultimately costing less for the equivalent performance and lifespan.

Environmental Impact

Moreover, lithium-ion batteries are safer for the environment than lead-iron batteries. And a much cleaner technology.

All-in-one solar street light

No current alternative is best for all scenarios, but lithium-ion batteries are more efficient and cost-effective than lead-acid in many instances, like warmer climates, despite their higher upfront cost.

Lithium-ion and lead-acid batteries can be used for the same purposes, but that is their only commonality. Lithium-ion battery packs are more efficient, safer, longer lasting, smaller, and lighter than lead-acid batteries. And that is why they are becoming the go-to for solar street lights and all-in-one solar streetlights.

If you want to read more information of our solar street lights split type and all-in-one solar street light please visit our Products page.