I haven't added anything to the car, no. Actually this all seemed to start after a bad rain storm in which my car suddenly began leaking inside under the passenger dash onto the floor board. I've since sealed around the cowel on the car preventing water from going into the air box beside the drain on the firewall. I've teste it by running a water hose full blast on that area, which it would leak before, but now t doesn't.
Anyways, there is the potential that maybe something in that area got shorted out, there is a fuse box in the glove compartment and I've checked the fuses with no luck.
I'll keep trying with the meter to find variations in the voltage.
Oh and it takes roughly 20-30 minutes driving after charging the battery although I'm probably not charging it completely as my charger is old and doesn't give you any idea how much charge your battery has.