High reliability and safety: Repeated tests on the various safety and performance characteristics of this battery have been conducted by us. CE and ROHS Certified. Long lasting and reliable power: The Micro Alkaline battery have been designed to provide reliable and long lasting power. They have an excellent price versus quality ratio, which makes them a very popular power cell all over the world. High quality: The trusted alkaline technology has been put in a compact design and 0% mercury has been added. Very low self-discharge, high leak protection, useful in a wide range of temperatures (-10°C to +60°C) Applications: These ag10 button cell batteries are most suitable for medical appliances such as medical thermometers, ear thermometers, blood pressure monitors and other small appliances like laser pens, calculators, pedometers and small remote controls (in e.g. car keys), watches, headlamps. Replacement for: L626, L626F, GP177, 377A, LR626G, LR626GH, L626C, L626H, AG4, LR66, G4A If your device uses any of the following batteries, you can try this battery: 177, 376, 377, SG4, SR66, SR626, SR626SW Specifications: *Voltage: 1.5V *Capacity: 20mAh *Size: 6.8mm*2.6mm （0.268 inches*0.102 inches） *Weight: 0.35g (0.012 oz.) *Operate temp: -10°C to +60°C Warning: (1)Keep out of reach of children. Swallowing may lead to serious injury or death in as little as 2 hours due to chemical burns and potential perforation of the esophagus. (2)Because human body is conductive, batteries will lose power if one finger is touching positive and another is on negative. (3)If batteries are not separately storaged, it may cause short-circuit or explosion.