To achieve truly effective telecom battery monitoring, operation and maintenance engineers must build a round-the-clock automated battery monitoring system (BMS). The core of this system must monitor three key indicators: internal resistance (IR), monomer voltage and temperature. GMDSS batteries are an important tool that provides power supply for GMDSS equipment operation in case of an emergency. Regulation 13, Chapter IV of SOLAS sets the following requirements for GMDSS batteries: Surely, to be ready for an emergency, the batteries must be kept in proper condition. Whether it is the. Base station energy cabinet: a highly integrated and intelligent hybrid power system that combines multi-input power modules (photovoltaic, wind energy, rectifier modules), monitoring units, power distribution units, lithium batteries, smart switches, FSU and ODF wiring, etc., to effectively solve. It has launched a hybrid energy solution centered on “photovoltaic + wind energy + lithium battery energy storage + intelligent energy management platform”, comprehensively enhancing the operational efficiency of base stations and assisting operators in accelerating the upgrade of 5G. This article provides an update of the battery testing requirements specified in the latest revision of NERC PRC-005, focused to illustrate the required testing schedule, and the scope of the two main electrical tests to be performed for a successful battery maintenance program.