The fix for this is simple. Appropriately size the battery when designing and manufacturing the device so that it is still capable of running the device a few years into it's lifetime, instead of a few months.
The after the fact fix for this is also to not refuse to fix your defective devices when customers bring them in under warranty claims, and definitely to not lie about them not being defective.
You don't make pay out the better part of a billion dollars in settlements and fines because you acted responsibly in a way that is hard to explain to consumers. You pay out a billion dollars in settlements because you broke the law.
The after the fact fix for this is also to not refuse to fix your defective devices when customers bring them in under warranty claims, and definitely to not lie about them not being defective.
You don't make pay out the better part of a billion dollars in settlements and fines because you acted responsibly in a way that is hard to explain to consumers. You pay out a billion dollars in settlements because you broke the law.