I had read about it on another thread, which was about using old smartphones as servers (they used Termux).
Those old lithium batteries, although sometimes seemingly healthy, can catch fire any time. Having them connected to the charger 24/7 is only making matters worse.
I wouldn’t trust the battery of old devices. I would probably buy a used UPS (without battery) and slap a new battery to it. This would cost more, but it would allow me to also connect other important devices to it - like the router and some lights.
I had read about it on another thread, which was about using old smartphones as servers (they used Termux).
Those old lithium batteries, although sometimes seemingly healthy, can catch fire any time. Having them connected to the charger 24/7 is only making matters worse.
I wouldn’t trust the battery of old devices. I would probably buy a used UPS (without battery) and slap a new battery to it. This would cost more, but it would allow me to also connect other important devices to it - like the router and some lights.