WinCell AG13 Alkaline batteries 12 pack

Often referred to as watch batteries the AG13 are commonly used in extremely small adult toys and novelties such as the silicone soft rings, micro bullets and many other discrete toys. Often confused with the smaller AG3 disc batteries, so the easiest way to determine which round battery you need is to measure across them. The AG13 batteries are the smaller with a diameter of 11.5mm.