CR2450 : 3v Lithium Primary Coin cell
The CR-2450 is a 3 volt Lithium battery. Non-rechargeable. DImensionsL 24mm diameter, 5mm thick. For multi-purpose applications (calculators, radios, memory, watches, clocks, etc). Available as Plain, or with Solder Tabs ($2.00 extra per cell).
Solder Tab option: 2 metal tabs are welded to the cell; 1 to the (=) side and 1 to the (-) side.