The service life of household LiFePO4 batteries is greatly affected by working conditions and maintenance methods. Under standard working conditions, its cycle life reaches 3000-6000 times, with a theoretical service life of 10-15 years for daily one-time charge and discharge household use. Batteries used and maintained scientifically with constant temperature storage and regular power calibration can reach the upper service life limit. Long-term high-temperature exposure, frequent fast charging, full-power standing or empty-power storage will accelerate cell aging, shortening the actual service life to 5-8 years. High-quality BMS and good usage habits are the key to prolonging battery life.