The discharge characteristics of the 2V1000Ah lead-acid batteries are affected by discharge rate and temperature with stable working condition adaptability. The standard 10-hour rated discharge current is 100A, with stable voltage and sufficient capacity release. High-rate discharge brings faster voltage drop and reduced effective capacity, while the 3-minute limit discharge current reaches 3000A, suitable for short-term high-power emergency scenarios. Low temperature significantly inhibits discharge performance, while high temperature improves instantaneous capacity but accelerates aging. With internal resistance ≤0.19mΩ, it has low discharge internal resistance and low output loss, with a smooth voltage curve during discharge. The standby working mode of shallow discharge and frequent recharging delays plate aging effectively and ensures power supply stability.