The CR2032 is a common battery in computers and laptops
That keeps the date and CMOS settings current when power is shut off. Also fits in many electronic devices and toys.
Specifications:
Battery Size: CR2032
Chemistry: Lithium
Capacity: 220mAh
Rating whr: 1
Cellnum: 1
Weight: 0.10 lbs
Battery Technology: Non-Rechargeable