I bought a simple 12v car charger, that delivers power through USB-C PD for up to 12v/2.5A from a cigarette plug.
I tried powering the Framework 13 like this and although it does appear to charge, the port seems to make a whining noise.
Is there anyone that knows enough about the charging circuit to say what could cause this?
The actual voltage on the battery was around 12.5v when testing this.
Are you sure it’s coming from the port and not the charger?
Power conversion can often produce noise if you don’t very carefully try to avoid it (everything is a speaker if you drive it hard enough XD).
Yes, I can even tell which port it is by putting my ear up to it.
Well that kind of excludes the noise coming from the internal power conversion in the laptop as that is in the same location no matter what port you use.
Sounds like the power coming from that psu is so ripply it causes something around the port to vibrate. Might want to look into getting a better one.
It’s definitely weird. It could be that something else on the circuit is causing such ripples.
I ordered an actual 12v power supply that should convert to 19v. This one didn’t appear to actually charge properly anyway, it’s just the light that comes on.
Unlikely, especially something that would change location when you change ports.
They do make some pretty decent 65W pd cigarette lighter psus, the 100w ones usually can’t sustain it.
Even if that thing actually provided the 12V 2.5A that is around 30W which is not able to power the system without a battery cause while it usually uses less than 30W on average it has a lot of spikes.
I must say, I’ve been a bit careful with charging computers in a car because the power output can be very instable, especially with cheaper chargers.
In my car I have Wegman 45 watt charger (also available at the same supplier you linked) which actually works properly and wasn’t too expensive, but never had a 100 watt charger. 100 watt on a car would mean over 8,4A in current.
A lot of cars are fused at 10A if I’m correct. So keep in mind if you also have other equipment on the 12V connector in the car.
100 watt on a car would mean over 8,4A in current
It most definitely can’t actually do 100W like advertised. On the side the output is labeled as 12V/2.5A.
A lot of cars are fused at 10A if I’m correct. So keep in mind if you also have other equipment on the 12V connector in the car.
I am not actually in a car but a sailboat. Lot’s of high current stuff connected here. I think it’s an AGM battery.
This post may be germane. The chargers mentioned are not good for cigarette lighter use - they need some decent 12volt power wiring.
Be careful, otherwise you may damage your laptop
While this is kind of an extreme case, yeah just because you can plug it in doesn’t mean you should, especially for chinesium x to y adapters (they’ll really sell you anything you ask for no matter how little sense it makes).
That thread is probably still really interesting to this case then as he is also on a boat.
I think some people just feel that we’ve made the world too safe.
Darwin plugs. To restart natural selection?
Just to come back to this, I bought this Amazon.se adapter which outputs 20v at 5A. This can charge the laptop as long as it’s turned off.
I can now comfortably keep my laptop charged using my AGM battery and solar panel.