PowerONDemond Technology: We Deliver Portable Power Solutions.....We know that only through constantly adapting and improving our product line, can we continue to be on the forefront of power conversion technology.our product are 100 percent tested on production line for voltage, capacity, seals and the safety valve are 100 percent visually inspected before the final assembly process,We can supply batteries - 4.5ah 6v battery, 7ah 12v battery, 12ah 12v battery, 20ah 12v battery, 26ah 12v battery, 42ah 12v battery, ...