Ford Focus c-max 1.6 tdci battery going flat I've had a new battery and alternator. Battery stays charged when disconnected?

Ford Focus c-max 1.6 tdci battery going flat I've had a new battery and alternator. Battery stays charged when disconnected? - 1

You have an earth leakage. Or a light on you can't see

Take the bulbs out of the trunk and under the hood and see if the batty is still dead in the morning, if its not, then one of those are where your problem is.

Your car has a parasitic drain.

Hi because teh alternator has a fault and needs replacing.

You have a parastic voltage drain. Sneak out to the car at 2am and see if you can see anything going. In the meantime invest in a Priority Start device