AG4, LR626 and LR66 are alkaline button batteries with identical dimensions and specs. They are a very common button battery used for consumer electronics and are not rechargeable. Most typical use of an AG4 battery is as a wrist watch replacement battery.
Equivalents: AG4, LR626, LR66, L626
Type: Alkaline
Diameter: 6.8 mm
Thickness: 2.6 mm
Capacity: 18mAh
Voltage: 1.5 volts
Weight: 0.3-0.5 grams
