CR3032

3v Lithium Cell Non Rechargeable Size 30mm x 3.2mm 

Hard to get rating = HARD

This battery is not common it is commonly mistaken, check you really need it, it is massive and for every 10 we sell, 7 are returned. 

Used in many micro applications including many Car Keys, Calculators, Watches, Clocks, Calendars, Organisers, Remote Controls, Memory Backup, Organisers, Micro Torches, electronic gadgets, collars, and many other applications.