BASIC INFO—VOLTAGE: 3.7V; Capacity: 70mAh; Weight: approximate 3.15g; Diameter: 20mm, Height: 3.2mm. ！！! SPECIAL NOTICE—Charge the battery ONLY with EEMB dedicated charger. CERTIFICATIONS—Safety test by UL: IEC 62133. More than 400 EEMB battery models are UL certified. Search "MH20555" on UL for all EEMB UL certification information. QUALITY SERVICE—We take pride in providing the highest levels of customer satisfaction, and we have over 20 years of experience in the lithium battery industry. Please contact us if you have any questions about the product via Amazon message. We will get back to you promptly. WARNING—Do not overlap or mix batteries in a disorderly way. If the positive and the negative terminals touch each other, it will cause SHORT CIRCUIT or EXPLOSIONS! Please keep out of reach of children. Do NOT SWALLOW. STORAGE—Keep the cells in a 40%-60% charged state during a long period of unused period. We recommend charging the battery every three months upon receipt to maintain the voltage. Store the battery in a cool and dry place. ！！! SPECIAL NOTICE—The battery may not be suitable for some LED candles and tea light. APPLICATION—May be suitable for solar flashlight, sensor, solar welding helmet, and other electronic products.