Someone please help because I'm stranded in a Walmart parking lot right now. I just replaced the battery on my 2009 BMW 335I. First starters they gave me an H6 battery when I removed in h8 so I don't know if that has anything to do with this but my dumbass connected the battery and then closed the trunk. It's acting as if the battery was disconnected however when I hooked up jumper cables to the terminals under the hood they sparked as if there was actually power getting to them. When I tried to jump it it nothing happened. What could this be?there are no signs if power anywhere. No lights, nothing....