BASIC INFOVoltage: 3V; Capacity: 240mAh; Diameter: 20.5mm, Height: 6.5mm. Connector: CR2032-MX51021. Attention: Do not charge! Make Sure Device Polarity Matches with Battery Pack Connector Before Purchase!!!-1.Battery Size; 2.Connector Model; 3.Connector Size; 4.Connector Polarity - THIS IS NOT UNIVERSAL!!! (It will cause a shortage if the polarity of the battery connector does not match your device.) CERTIFICATIONSSafety test by TUV: IEC 62133. More than 400 EEMB battery models are UL certified. Search "MH20555" on UL for all EEMB UL certification information. POWER LONGEVITY & ENERGY-SAVINGEEMB coin batteries are safe, free of mercury, high pressure and high energy density. Operating temperature range: -20 to + 60. Durable for long lasting performance. Less than 3% per year at room temperature. Long effective period. Superior high-speed pulse discharge characteristics. Continuous discharge stability. Will not leak in equipment during use and for two years aft