Brand: PKCELLMay also be known as: LR66 LR626 SR626W 177 377 377A SR626W SR626SW G4 V377 Capacity: 18mAhVolt: 1.5 voltChemical Composition: AlkalineDiameter:About 6.75mm / 0.26"Height:About 2.5mm / 0.10"Conversion : 1mm = 0.0393 inchApplication: Clocks, Watches, Calculators, Computers, Cameras, Digital cameras, Digital voice recorders, Toys, Blood glucose,Remote controls, Electronic games and so on Package includes: 4x AG4 Button Coin Cell Batteries Note: A: Some customers are confused about model number. Different callings. For example, AG13 is also called LR44 or A76 or 357. Actually they are the same. B: Sometimes we hear from customers they bought wrong size for their devices. That's very understandable. Because those Alkaline button cells are very small and look very very similar from pictures.Voltage are all 1.5V. Material are all Alkaline. The differences are dimensions.