Telecom batteries for base stations are backup power systems using valve-regulated lead-acid (VRLA) or lithium-ion batteries. They ensure uninterrupted connectivity during grid failures by storing energy and discharging it when needed. My understanding is that they used to use negative 48V DC power, i. Today, it's possible to find these telecom batteries, like those made by Victron. . To maintain high service availability, backup battery groups are usually installed on base stations and serve as the only power source during pow-er outages, which can be prevalent in rural areas or during severe weather conditions such as hurricanes or snow storms. As the “power lifeline” of telecom sites, lithium batteries. .