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These days it is rare for a phone to be able to be used without a battery. The reason is that the max energy consumption when the CPU and GPU are running 100% exceeds the wattage that the device can accept over USB PD.
These days it is rare for a phone to be able to be used without a battery. The reason is that the max energy consumption when the CPU and GPU are running 100% exceeds the wattage that the device can accept over USB PD.
That can't be true right? PD (and some Chinese standards) have insane wattage allocation/allowances, there's no way that a mobile CPU can pull over that amount, it's more that they don't support it.
Accept, not what the power supply can supply. Cell phones aren't being made with massive laptop-sized 100W accepting circuitry.
Earlier quoted context omitted.
That can't be true right? PD (and some Chinese standards) have insane wattage allocation/allowances, there's no way that a mobile CPU can pull over that amount, it's more that they don't support it.
> device can accept over USB PD Accept, not what the power supply can supply. Cell phones aren't being made with massive laptop-sized 100W accepting circuitry.
Surprisingly they are, supervooc goes up to 120w now (which is insane), there is also a Motorola phone which also does 68w via PD standard
https://m.gsmarena.com/oneplus_15-review-2898p3.php
https://www.gsmarena.com/motorola_moto_g_stylus_5g_(2025)-13...
As for past through charging, it's actually apparently more common then I knew.
Google does it as part of their "adaptive" charging (hits 80% then does pass through) and the OnePlus etc also do it with a settings for gaming.
(Older article confirming this https://www.androidauthority.com/phones-with-bypass-charging...)
While I’ve seen plenty of swollen and deformed phone batteries, I’ve never personally seen one that has burned. Obviously it’s happened in the past with certain phone/battery models, but I’d imagine that it’s actually very rare now days? On the other hand, I have seen cheap 18650s spontaneously start smoking even when they weren’t plugged in to anything…
Why not just have the charge controller "unplug" it if the battery is full?
All of the controllers do that! But then battery starts to self-discharge, eventually a controller detects "huh, the battery is no longer charged" and start charging again. Over years, this can accumulate enough charging cycles so battery gets worn down.. And old batteries have even higher self-discharge, so the cycle accelerates. If you are lucky, the battery lasts long enough. If you are unlucky, you end up with "s…
As, somehow it managed to turn all four cells in the pack into pillows. Which indicates a shockingly flawed balancing system
The real question is "what the hell is a farphone"?
The name likely comes from “fairphone” with the “i” scraped off - see the photo: https://far.computer/
These days it is rare for a phone to be able to be used without a battery. The reason is that the max energy consumption when the CPU and GPU are running 100% exceeds the wattage that the device can accept over USB PD.
What I cant figure out is how to detect power usage from the PMIC when in that configuration. ie seems to still assume power draw happens via a battery.
So the Fairphone 2 runs on just a USB cable with no battery inside?
I'd like more details. Many devices won't run on USB cable alone: they won't start without a battery as well.
Earlier quoted context omitted.
I have multiple devices with lithium batteries plugged in 24/7. A kindle that I use as a display for example. So far nothing exploded. If exploding kindles were a thing I guess I would have heard.
you use a kindle as a display?