Charging problem.

[Palmz]

Im having problems with the VR4. the problem is the car drains about 4-6 in about 15 - 24 hours i checked the amp drain and its only 0.13 amper,
it looks like its just a bad battery however i have tried 4 different battery's and all with the same result. I should mention that a volt meter says the car is charging about 13.5- 14.4V

My father told me to try to unplug the battery with the car running and see if it keeps running it doesn't. so he thinks that there is something wrong with the alternator
the alternator is a regular MMC 4 pin obd2 alternator. I was thinking of cutting the wire that goes from the ecu to tell the allt how much to charge and put it straight on the battery (+)

if anyone has any suggestions please tell me
I plan to get two battery's tested on monday

Info about car;
2.5L twin turbo 6a13- EC5A 100A alternator

[RedGalant2k1]

You could try cleaning all your battery, and alternator cables.

[Palmz]

battery cables are new and ive had a look at the alt cables and they look okey

[RedGalant2k1]

Have you load tested the electrical system?

[Palmz]

No how do i do that, or is it something i have to go to a shop for ?