The 12V 200Ah lead-acid batteries, is a mainstream large-capacity energy storage component in the energy storage field, with core parameters suitable for civil and industrial standby power supply scenarios. It has a rated voltage of 12V and a rated capacity of 200Ah under the standard working conditions of 20-hour rate and 25℃, with a standard final discharge voltage of 10.8V. The maximum instantaneous discharge current reaches 1000A for 5-second short-term discharge, meeting the instantaneous start-up demand of equipment. The daily float charging voltage is 13.6-13.8V, and the cycle charging voltage is 14.6-14.8V. With a monthly self-discharge rate ≤1.3%, it has low static power loss and a float service life of 8-12 years under standard conditions.