28.0V, 4000mAh, Li-ion Battery fits Wurth Master, 28v, Bs 28-a Combi, 112WhBattery Fits Models: 28v, Bs 28 a Combi, H 28 ma Battery Part Numbers: 0700 956 730 The products we supply will work for the device that it is provided for and is built to last as long as the battery that came installed originally. Cameron Sino batteries have manufactured generic batteries for many years. We offer the freshest batteries straight from the manufacturers; they are reliable and built with safety as an essential part of their construction.