This is in excellent condition. It is BMW branded but I assume that it would work for all car batteries. We are giving it away because we no longer own a car.
The battery Conditioner/Charger CAN NOT rescue a dead flat battery. The battery must still have at least three volts of charge left. I believe it is intended to be used regularly to keep a battery in good condition when you are not driving enough to recharge it normally. We bought it because even when your car is sitting in the driveway the security functions will draw on the battery and will reduce its charge to the point there is not enough charge to start the engine.
BMW Battery Conditioner/Charger (Central Watford WD17)
This offer has been gifted to someone and is no longer available.