I left my BMW unused for 6 weeks. Then I started the engine for 10 seconds and turned it off. A few days later I started the engine and drove it 10 metres and turned it off. Then I attempted to start it again and it failed. Now it won't start. All the electrics seem to work apart from the engine.
It took me an hour to find the battery. It took me another hour to remove the stupidly designed plastic cover on top of the battery.
I have a portable charger. The instructions are awful but I think it's telling me that the battery has too little charge to be charged without mains power. There is no mains power point within the area that I can push the car.
I think the battery is the original. The car worked perfectly before this.
How should I charge my battery?