parasitic battery drain

this car is daily driven ....and the red battery is from another car and is known good but the yellow battery I had in there before was draining overnight. and most of the time it would start but with a weak "wirrrrrrrr ....wirrrrrrr click click wirrrrrrrrr vroom".....and the gauges would go crazy till it ran a little and then it would straighten out ....and a ten mile trip would charge it and it would start strong until night time again .....for the last week ....I didn't have time to spend with it so I would just pull the radio/dash lights/gauges /and dome light fuse and it made the test light shut off....then before leaveing in the morning ...put the fuse back in.

I didn't want to put a new battery without knowing if it was a problem with the car ....a new battery would mask the problem for some time but it wont go away till you get to the bottom of the problem