Edit: see comments for clarifications.
I am probably late on this one, but god damn this is one nasty trick by Philips.
Context; I recently decided to upgrade my shaver, from a Philips One Blade to Philips an all-in-one-trimmer-7000. As you can see on the pictures below, they changed the charger for the adapter by maybe 1–2 millimetres, just so the old charger could not be used by the old charger. Now, this normally isn’t a big deal, but with the new trimmer, the charger is USB-A only. Where’s the previous one had the plug on it instead. To me this is mildly infuriating as I know need to get an extra adapter just to charge my shaver in the bathroom. They had the exact same design for the chargers, yet changed it just slightly so they wouldn’t be able to be reused? Why… Philips… why?
Edit: many good points in the comments! I don’t know how to manually check the voltage, but seems like folks figured it out in the comments too. Should have just been USB-C!
I have about ten of these cables, and they are interchangeable.
Yeah because they are standardized. However, these are too big to fit in that razor and the only reason these cables are interchangable is because they follow that standard.
IEC C7
These cables only supply power straight from the net, which is why they are interchangeable. I have some trimmers/shavers that use a similar cable as the one OP is showing, but they are much smaller then what you are showing. The trimmers have an adapter somewhere in between (because incorporating it into a handheld device would be bulky and… why would you want to?) So, because the power is ‘adapted’ it’s no longer interchangeable.