Products through the German TUV Rheinland certification, UL certification, the performance indicators of the national standard. Stable performance, reliable, cost-effective. Product has adequate capacity, internal resistance is small, less self-discharge, stable platform release point, long cycle life, wide temperature and so on. Our products are widely used in military, communications, transportation, lighting, power tools, instruments, toys and so on. Battery Size: Diameter: 25.5mm, Height: 50.0mm, capacity :2200-5000mah. Voltage: 1.2V