Why Lithium Batteries Are Lighter and Smaller Compared to Lead-acid Batteries

The mainstream cylindrical batteries, lithium batteries, flexible packaging batteries and square batteries on the market are generally lighter and not as large compared to lead-acid batteries. This is mainly due to the energy density and safety reasons.

Lithium batteries have high energy density, so they are not designed to have too large a capacity for safety reasons. The energy density of lead-acid batteries is relatively small, compared to ternary lithium batteries can reach 300Wh/kg, the energy density of lead-acid batteries is generally about 40Wh/kg. And the density of lithium batteries is still improving year by year, and it is because of the energy density continues to improve, we are also increasing the requirements for safety.