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 don’t actually know how long it lasts; I’m unusually vigilant about swapping batteries. I just put a fresh one in the razor, I’ll let it wiggle itself to death and tell you how long that takes.
Don’t worry about it. It’s not a big deal. I’m just talking about AA battery-powered devices in general.
Yeah, I just did some math instead. Toothbrush is a similar wiggly thing and it will supposedly run 720-ish minutes on a AAA battery, so more than that, probably.