I replaced the alternator and a new battery and the battery will not hold a charge
Replaced alternator battery can still
Replaced alternator battery still a challenge Will not hold a charge what can
There may be a parasitic draw on the battery. You would have to have a volt meter to check it. They have a video on you tube to describe how to check for this.
Search Ford Focus Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Ford Focus Experts