Lights on for 6+ hours. Charged several times, battery is new, car won't start.. on 2005 Mini Cooper

We used three different chargers, so it's not a charger problem. What could be the problem?

Asked by for the 2005 Mini Cooper
You need to test the charging system and the battery with proper equipment. Battery could still be dead.
1 more answer
Hal is right...Is it a AAA battery? Not quality battires!