Hi guys, I am no mechanic by any means, and, considering that, is there any easy reason as to why my big new (last year) battery is slowly draining on my b6000? I fired it up last weekend, and I could tell it wasn't all there, and then this weekend I had to jump it to get it going. When i turn the key, the glow plugs work, the little light above the key comes on, and it cranks a bit, but by no means like it should. The battery is a big one, bought it at the end of last year. Any help would be greatly appreciated, thanks.