You can swap a coin-cell powered design that uses one-use Lithium 2450 cells for this rechargeable cell. This battery is like a little Lithium Ion battery, but in coin cell shape. It doesn't have a huge capacity, only about 120mAh, compared to the 600mAh common to primary non-rechargeable cells.
There are a few things to watch out for when using these batteries:
Lithium Ion Rechargable Coin Cell Battery - LIR2450 (16:34)