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!
Having experience with electromechanics - I have seen times where this was done on purpose to make sure that people aren't trying to reuse an incompatible plug for charging purposes. NiCd doesn't charge the same as LiFePo, Li-ion, etc. Charging voltages, polarities, stability of power output, etc.
To be fair though, they just need to make everything USB-C anyhow. Especially shavers.
Isn't it to make sure that you're not mixing two incompatible chargers? I have 2 Philips chargers that do fit (as far as I can see), but are not the same voltage. I've previously also had something like this where 2 fitting chargers were completely different electrically, one 12V AC and the other 9V DC. One time a family member mixed them up, bit luckily the extra voltage didn't fry anything. I don't mind having to get an extra charger of it prevents me from doing something dumb and frying my electronics.
I can tell you for certain, I measured my plug phiips (foil and 'one') and they are both 14VDC.
So short answer is that the plug charger would blow up the usb trimmer you have (which is 5VDC).
The reason I know this and measured them, was because I wasnt sure the two plug chargers were the same, and I didnt want to blow up my philips one.
Make sure the voltage and power requirements are the same. Maybe the old one cannot deliver enough juice for the new one.
That's one reason a lot of device designers go for USB C proper: it supports multiple voltages and multiple power levels, and in a way where the devices shouldn't be able to pull too much power from a smaller charger. (assuming they implemented the spec and didn't just use the plug anyways) In theory, one smart charger with enough oomph could charge anything that sticks to spec up to 240W.
If they are the same voltage just take a razor and shave some of the material away, I had to do this to get a c7 connector to fit into my xbox one, the rubber was just molded too far to fit
The battery died on my old shaver. Because I can't leave well enough alone, I decided to see if I could replace it. Spent so much time tracking down the battery model number and looking for a replacement only to find out it's a standard triple a. It's identity was obfuscated by the stupid labeling. Soldered it in and bam, razor still works for several years.
My Philips shaver does not work whilst charging. What's that all about?
Luckily the battery is good but it gives very little warning when its about to run out. I dont grow facial hair very quickly or very thickly but several times I've had to leave the house partially shaved. Doesn't make any sense. That's the whole point of electricity, to use stuff whilst plugged in!
Coincidentally, I just got a knock-off Soda Stream from Phillips. It's over $150 cheaper and works 2x-3x times better. I wanted to build something similar for a homemade soda bar concept, and discovered how truly cheap it can be to make soda and carbonated water at home. I was shocked at what a simple concept it is, and how much of a profit these sodas water companies make. Phillips even charging $50 for their system is a total rip-off.
Truthfully, I think the increase in quality in the Phillips machine is due to fewer parts is an "exception that proves the rule" as these in-bottle carbonators seem to work better with fewer parts. It's just a pressure hose connected to a co2 tank. Literally, all of $6 if you were to build one yourself from parts on Amazon (or $3 if you got he Alibaba route)
I truly believe that the fewer parts the better in any DIY or commercial product due to the less chance of a failure in a part if there are fewer parts. This works fantastically for the "lower quality" producing companies, like Phillips.
My inventive and engineering entrepreneur friends and I call this "fewer parts the better" concept, a "Murphy's law compensator" as the fewer parts there are, the fewer parts that can statistically "go wrong"
I have the cheapest Philips shaver. It is pretty mid. It came with its own charger. On the shaver's side it looks like a standard ungrounded 220V female connection. But it actually is some propriety DC thingy. Very annoying. Why not just use USB-C?
Yea, id fix that with a lil creative carving with a pocket knife. Recently did this with a brita pitcher. They go to great lengths so you cant refill the cartridges with activated carbon. They underestimate my determination.
Philipps is a shady company and I support anyone who decides not to buy from them ever again.
With the Hue bulbs the force you to share data, so I had to manually install an old version of the app just to not share data - no other way to opt out. So I can't say I'm surprised they pulled something like this.
One is for charging the other is for power. There's a huge difference. At least with my phillips electric - the power inverter is inside the shaver. The cord is just a bog standard C-type power cord.
Your new cable is a charger cord -- because it's already pulling the correct DC voltage from the USB port.
[e] I was wrong - both my Norelco and my Andis foil shaver both have AC inverters on the charge cables. Interestingly, the Philips charges at 15v! Probably so you can use it while it charges.