While you wait for answers, we may have found some information which could help you.
Click here for Braun Shaver ReplaceHow do I take a Braun 5502 shaver apart?
How to change the battery in my Braun Shaver?
Batteries for Braun shaver 5614?
I cannot find any tabs or screws in order to open my Braun 5550 razor. The ?
How to replace Braun Trimmer in Series 7 790cc?
Braun Shaver AC/DC Power plug broken, can I use a normal 12V adapter?