[29083011397778]

I'd assume the solution was introduced with the iPhone 6. The problem was there much earlier, due to the way Li-Po batteries work.

As such, it could even be counted as one of the touches Apple is known for that other OEMs don't bother with. It just needed better communication.

[mthoms]

Can confirm. My 5s suffered the random shutdown issue and wasn't part of the throttling fix.

[schadara]

Yes, this was a feature. This feature was so great that they kept it a secret and were subject to lawsuits and forced to pay millions in fines.

[thebruce87m]

They were fined for not telling people about the feature. The feature still exists.