Communication base stations are core nodes of mobile networks with strict requirements for power stability. Lead-acid batteries are the most mainstream backup energy storage devices for base stations. During power outages and grid fluctuations, they switch power seamlessly to maintain stable operation of base station transceiver and transmission modules and avoid signal interruption. With mature technology, stable voltage and strong anti-interference ability, they adapt to 24-hour continuous operation. Featuring high temperature resistance, low self-discharge and maintenance-free design, they suit outdoor and mountain base stations. With high safety and cost performance, they have long been the main backup power for 4G and 5G base stations.