charging power/current

[ciemunio]

Hi,
I just received Macbook Pro with M1 Pro, 14" and I am checking charging power. It should theoretically use even more than 100W, but max what I get is 77W.
Tried original charger (94W) with magsafe and satechi 165W with usb-c cable (on single port it gives max 100W).
It does not matter if battery is on 16% or 80%, max is 77W.
Does anyone (all?) have possibility to use full 100W?
I am checking values using iStat Menus and Better Battery 2 because System report shows only information about charger and not real current/power

 

[unrigestered]

the system will draw as much as it needs. charging too fast isn't that great on the battery anyway, but if you really want to max out your charger's capabilities, try to deplete the battery by a good bit to let's say 10%, put your laptop on a charger and run something CPU intensive like some Blender projects, or Cinebench

one should also keep in mind that many cheap chargers are stating their peak performance, which they can only provide for a brief time before going up in flames.
not saying the Apple charger will do this, but there are definetly enough chargers on the market with "false" values.

 

[meson]

Apple claims that fast charging should charge 50% in 30 min. A 70 Watt-hour battery charging at 77W meets or slightly exceeds that standard, so yeah 77W is likely the max. It's only the 16" model that can draw more power.

Just because a power supply is capable of drawing 100W does not mean that it is capable of delivering 100W. Nothing is 100% efficient. Modern devices won't draw more power than they are designed to draw, so using a bigger brick won't get you faster charging.

 

[mr_roboto]

Does anyone (all?) have possibility to use full 100W?

Apple limits the rate at which the battery can charge because lithium ion battery technology is dangerous. Truly unlimited charge rate would encourage side effects like explosion or fire. It isn't possible to force the 14" MBP to charge its battery faster, nor should you want to.

If you really want to observe your computer drawing 94 to 100W from a charger, run your battery down, plug the computer in so it starts charging, then start up an intense CPU or GPU load. The charger isn't there just to charge the battery, it also provides energy to run the computer.

 

[ciemunio]

I was just curious if everything is fine with my charger. Will try at some point to use something that really uses M1... Thank you