What is the normal lifespan of an electric bicycle's battery?
Release time:
2025-09-24
The battery of an electric bicycle usually refers to a lead - acid battery.
The battery of an electric bicycle usually refers to a lead - acid battery. The lifespan of a lead - acid battery refers to the number of repeated charge - discharge cycles. A complete cycle is defined as fully charging the battery until it is completely discharged. As the number of cycles increases, the capacity decay of the lead - acid battery is inevitable. When the battery capacity decays to a certain specified value, it can be considered that the battery has reached the end of its lifespan.
According to the standards for electric bicycle batteries, if the remaining capacity reaches 70% of the initial capacity after 300 charge - discharge cycles, it is considered qualified and up to the standard.
In other words, for a qualified lead - acid battery, the normal cycle life during regular use is 200 - 300 cycles. That means for ordinary consumers in daily use, as long as the correct usage methods are followed, a good - quality battery can generally last for more than two years.
Of course, the cycle life of a lead - acid battery is also closely related to the charge - discharge conditions:
-
Charging with the standard current (generally, 0.2C is the standard charging current, which means the current is 0.2 times the battery capacity) and adopting shallow charge and shallow discharge can effectively extend the cycle life of the battery.
-
If charged with a large current (generally, 0.5C is considered fast - charging current, which means the current is 0.5 times the battery capacity), it will affect the battery's service life. That is to say, the larger the charging current (the faster the charging speed), the shorter the cycle life.
Lead - acid batteries can handle short - term large - current discharges, and such discharges have little impact on the battery's lifespan. However, they are vulnerable to continuous large - current deep charge - discharge cycles.
From a technical perspective, there are multiple factors that affect the lifespan of a lead - acid battery:
-
There are internal factors such as the composition of active materials, crystal form, porosity, plate size, grid material, and structure.
-
There are also external factors such as the discharge current density, electrolyte concentration and temperature, discharge depth, maintenance conditions, and storage time.
Focus on providing of electric bike batteries with excellent quality and service.
