These cells come in a blister pack of 2 and are known as the LR1 or N cell as well as GP910A, MN9100, AM5, 4001 or E90.
It is used in applications such as key fobs, remote controls, fish bite alarms, radio pagers and door bells.
Carp and Pike Fishing Bite Alarms such as the Fox Micron M, MX, MMX and MMXR, Warrior & EOS Range.