LR1 910A E90 N MN9100 Battery
1.5V ALKALINE BATTERY [30.2 MM X 12.0 MM DIAMETER]
NON RECHARGEABLE (CYLINDRICAL BATTERY)
Replaces: LR1 N 910A MN1900 AM5 4001
This battery is commonly used in clocks, remote controls, doorbells, cameras, toys as well as many other similar applications.
It is also the battery used for the Fox Bite (and other) fishing alarm systems.