Standing battery voltage loss

[jcblitz]

I fully charged my battery yesterday and checked it, 12.3 or so. I ran my bike and it was holding around 14.3 for about 5 minutes. Turned the bike off and the battery was at 12.5. Checked it today with the bike off and it read about 11.5. Started the bike, checked it running, 14.3 again. Shut it off after 5 min, 12.5 again. Is it normal to loose that much voltage in a day or do you think something is draining it (even though the bike is off). I have an alarm and an LED hooked up and I have the ground wires running to the battery ground instead of a frame ground...anyone know if that matters? I don't think so, but just double checking.