I will assume you mean "Does a Mini Cooper have a battery?" Yes, they do.
2005 Mini Cooper replace car battery. Alternative to MINI part
$166.45 at Mini Cooper Dealership, but you can buy it at Western Auto for $145.99.
You can change the battery in your Mini Cooper by releasing the hood lock located on the bottom portion of the dashboard. The key to unlock the battery cover should be on the side of the battery cover.
Batteries Plus
Use your key in the door.
No
Purchase a simple battery charger like a Battery Tender, or a Ctek. Follow instructions.
Some 06, and 07 and up MINI Cooper S, Cooper Clubman S, Countryman with all4 pkg, coupe & roadster S, and all true JCW (John Cooper Works) MINIs
To change the battery in the Mini Cooper keyless remote, it is necessary to first open the device. This can be done by removing the key chain and gently prying the seam at the opening end apart. Now the battery is accessible for easy replacement.
It will delete the pre-programmed radio stations.
a good light weight factory type battery would be the mini cooper battery or the CSL m3 battery