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!
Maybe I’m confused.
Your new trimmer takes in USB (Low Voltage DC) power.
Your old trimmer took in Plug (High Voltage AC) power.
If that’s the case, yeah of course the plugs would be different? You’d fry the new one with the old plug.
The OneBlade has a transformer in the wall plug part, the actual cable going to the handheld unit is only carrying low voltage.
What low voltage though? Unless it’s 5V like USB (non-PD and non-QC), they should and need to be incompatible.
looks like the old one was 15v, while the new one is 5v.
Now, if it has used USB-C it could still be 15v…
came to say that. Looks like the old one was 15v, while if the new one is USB-A it was 5v.
Now, if it was USB-C, it could still have been USB-C!
Neither of them take AC power. I have an older one similar to OP’s old one. It uses a wall wart and the input is definitely DC.