It's not a bug or issue with those phones, it's how batteries behave -- over time, they lose both their capacity and the power they output. Apple decided to throttle their phones via software instead of letting them crash.
I've said this before, but it was the right idea executed the wrong way. iPhones give you a warning when they overheat, and this throttling should have gotten a similar warning with a link to an FAQ explaining the battery dynamics.
Nope. There was an issue in iPhones and Nexus phones that had been used for a few years where a worn battery could no longer maintain a voltage high enough to meet instantaneous SOC power demand, resulting in unexpected device shut downs.
Apple got the device to quit shutting off without warning by throttling older devices and Google did nothing and just told users to buy a new device.
They both got sued, and both lost.
> If you currently or formerly owned a Google Nexus 6P smartphone, we have some good news: you might be eligible for a cash rebate for those bootloops and spontaneous shutdowns the device was known for.
https://www.androidauthority.com/nexus-6p-lawsuit-2019-97547...