I would question the charge on the battery. Rapid charging any battery is not good for it, nor does it lead to a full and proper charge. Think of it like filling a bucket with a hose on 'full'. .the water splashes and sloshes around, and you stop filling the bucket because the water is splashing out over the top i.e "full" but when you stop filling and the water settles down.. you can see the bucket is quite a ways from full, so you fill it at a slower rate... same thing with batteries.
I would suggest getting your hands a small charger.. 6 to 10 amps, and charge it for several hours.
from your last post, I don't think you have a draw, I think your alternator is no longer charging.
one of those digital volt meters that plug into a cigarette lighter are a good way to verify if you don't have a good volt meter.
you should always be making more then 13 volts, except at idle.
anywhere from 13.8 up to 14.5 is a good range.