Left the map lights on all day and now car won't start...1999 Buick Century...charged battery but still wont turn over

Sounds like the battery got run down so far that it wont hold a charge-maybe take the battery out and take it to a parts store that can "load test"the battery-some testers can actually test the battery even if its dead-also when u charge a battery u have to make sure the clamps from the charger make a good connection. i read somewhere that everytime a battery goes dead it shortens the life of the battery-FYI most batteries last from 4-5 years if there are no other problems with the car.hope this points u in the right direction.