The worst part of the spicy pillow problem is that even if you remove the battery cell and solder a power supply to the BMS, Android will eventually decide "I must be out of battery by now" and shut itself down. You have to root the device to override this and it is supremely annoying.

Of course if the thing could just run directly off wall power like you suggested, this wouldn't be a problem.

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SchemaLoad 2 days ago | parent [-]

I'm told that most phones have power usage spikes that exceed the power delivered by the charger, and they use the internal battery as a capacitor to soak up those spikes.

	▲	fainpul 2 days ago \| parent [-]
		To a certain degree, that might be true. However, small batteries like they are found in phones have relatively high internal resistance (voltage drops as current draw increases). They can't deliver huge currents like capacitors. A beefy enough power supply should be able to handle power spikes even without a battery installed.