I forgot to say, to the author of this teardown: thanks, the dimensions of the speakers totally helped me out! If you can solder they are easy to replace and the new ones I put in mine sound great!

It's a Torx T7 bit.

I have a similar Norelco razor and replaced the battery. I can’t believe the stupid company didn’t mark the battery polarity on the board!

I think this is the first time I have ever seen a company not mark polarity.

nathanrenniewaldock is right... I cracked my screen before finding the hidden screws on the bottom. what a silly company to use the same name for different models!

Thanks, easy and went well!

Maybe you need a thinner spudger, TH?