I've owned my 2005 3.0 s type since 2007 now with 83,000mls. But lately the battery is losing charge. I changed the battery as the one that was on there was 6yrs old. But with the new battery its draining within 3 days. I've checked the boot light, the glove box light, the interior light and the door lights. None of them are staying lite up. I tested the charging and its about 14.9v on tick over and 12.3v with engine off. It must be a big drain to kill a new battery in 72hrs. Anybody got any ideas or had similar issues. Thanks