On my Mercedes ML 55 AMG 2.5-year-old battery was empty again after several weeks life. I have not sought the cause. The PowerPack Bully has not managed to turn the motor at all, even though the battery indicator indicating high. The Starthilfebox was again well over 24 hours a 220 V mains charged. Even after not turning the engine with the connected Powerpack Bully was reached. Then the ML was 55 with jumper cables and a two years ago out of my Mercedes E 500 removed battery (which was still kept to jumpstart these vehicles) launched successfully on the first attempt.
Lt. Manufacturers should be the Powerpack Bully suitable kick-start for motors up to 8 liters of displacement ... My Mercedes ML 55 AMG has not even turned on a V8 engine with only 5.5 liters and has been! Because of my bad experience I will arrange the PowerPack only a bully in the category Toys and recommend it only for money boxes.
Sorry, I'm really disappointed with the "Power packet". (Important: The phrase "money boxes" I want but smaller devalue motorized vehicles not!)
