There’s some variety, but it’s either a 1616, 2025, or 2032. I believe they’re all 3V.
The numbers represent the physical size. 1616 is 16mm in diameter and 1.6mm thick.
I didn’t realize this before looking it up just now, but they’re interchangeable, as long as you can get the battery to physically fit (and watch out for surprise voltage exceptions).
There’s some variety, but it’s either a 1616, 2025, or 2032. I believe they’re all 3V.
The numbers represent the physical size. 1616 is 16mm in diameter and 1.6mm thick.
I didn’t realize this before looking it up just now, but they’re interchangeable, as long as you can get the battery to physically fit (and watch out for surprise voltage exceptions).