You could permanently attach a power supply and hang it on the wall as a weather display.
I like that idea. How feasible do you think it would be to bypass the battery and power it with an AC adapter?
I'm not sure it would be able to stay powered with battery involved. I'd have to do some tests, but with the display on, I think it would draw power faster than the USB charger is replacing it.
Generally, you should be able to charge and run the device at the same time. You're baking out the battery at this point so you need to watch it for any signs of swelling or other damage.
Some devices don't like the battery not being there, as they rely on it as part of the charge/filtering circuit. YMMV if you remove it.
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