This power system mainly includes the power supply module and the lithium battery module. It is high efficient, compact, lightweight, easy to install. It doesn’t need a setting, and its maintenance free. It also supports capacity expansion. It is specially designed for the wireless base station. YTK series power supply module. When the AC input is normal, the AC output supplies power to the load through the bypass, the DC output supplies 48V power to the battery. When the AC is turned off, the DC output is inverted to 220V to supply power to the load. ZR power module converts AC or HVDC to steady 48V DC. Lithium battery module supply power to communication equipment. It is in compliance with UL60950-1’EN60950-1,IEC60950-1,UL50, EN60950-22, and RoHS.