Hi, firstly I'm new here and have a very basic mechanical capacity. My 54 plate Mini Cooper has developed a starting problem over the last 3 months. I came out and turned the key and nothing but a single click. I immediately thought battery and bought a new one for £90. I fitted it and it started first time, problem solved. But it wasn't. A week or so later same thing happens, completely dead. I assume something has drain my brand new battery so I go out and buy a trickle charger. When I take the battery off I notice a nice spark and think, hmmmm, that doesn't look dead. I plug it in and the charger says fully charged and the indicator on the actual battery is 100%. I put it back on, noticing the nice spark again, try it and it starts first time. Works fine for a few days then dead. After lots of looking at the engine and not knowing what I'm looking for I managed to discover that every time I disconnect and reconnect the battery it fires fine. It then can work for hours, days or weeks but then will fail again, when it does I disconnect and reconnect and we are good to good for a while. I am completely stumped and shudder at garage fees so I'm hoping it could be an easy fix. Any help or advice would be fantastic. Thanks!