if so, how does it's recharger look like?
CMOS batteries are
Batteries such as this
Some motherboards used to have rechargable CMOS batteries on them.
In general now, no CMOS battery (especially the silver button cell type) are rechargable without investing in a specific rechargable version.
Do not - I repeat - DO NOT attempt to recharge a non-rechargable lithium cell (button type) as the resultant explosion and noxious gasses could kill you (or worse).