What is the battery capacity of a mild hybrid?

Mild Hybrid Electric Vehicles (MHEVs) are typically equipped with a 48V battery system, whose capacity generally ranges from 0.4kWh to 1kWh, with specific values varying by vehicle design. For example, the battery capacity of the 48V mild hybrid system in the BMW 5 Series is approximately 0.4kWh. Such batteries are mainly used to assist the internal combustion engine in start-stop operations, energy recovery, and short-term power supplementation, which can improve fuel economy by about 10-15%. 48V batteries use lithium-ion or lead-acid technology, are lighter in weight, and have lower integration costs, making them suitable for optimizing the energy consumption performance of traditional fuel vehicles. If specific vehicle battery parameters are needed, It is best to consult the manufacturer's technical manual or contact the brand dealer for accurate data.