O.E.M. Mercedes battery won in a contest.Only reason I decided not keep it;not a sealed battery.Arizona is too hot. If properly maintained this battery will give you at least five years of service.Adding distill water when needing to top off the cells gives maximum battery life.Leave contact information to view... This battery runs for over $260.00 at a Mercedes dealership! Please,ignore the date on the pictures.The date function stopped working on my digital camera.Pictures were taken yesterday...