Friday, November 21, 2008 - 07:58 pm, by: David Vaughan(Davidv)
I would say your battery was cactus but you say you have put a new one in already.
30 mAH is not going to drain your battery in a month let alone an afternoon, so static drain does not sound like the problem unless "something" is happening some time after you switch off.
Still, a fully charged battery should sit nearer 12.6V than 12V.