While you wait for answers, we may have found some information which could help you.
Click here for Replace Help AppreciatedBraun 5550 Shaver Battery?
Braun 5567U Electric Razor?
How to replace Braun Trimmer in Series 7 790cc?
How to replace battery to a Braun silk epil lady shaver?
How to change the battery in my Braun Shaver?
Braun Shaver AC/DC Power plug broken, can I use a normal 12V adapter?