Then your competitor with the same battery cells says 85% is the new 100% and now they have longer battery life than you do.

And then maybe your competitor gets an announcement on every plane reminding people not to buy their product :-)

No, because again, this is not about preventing batteries from exploding. They already shouldn't explode. This is purely to give them a longer lifespan – which is not that attractive to producers, who I assume want to sell more batteries.

Ah yep, didn't read the thread carefully enough.

Or maybe they'll buy the competing product that has 25% more runtime, or is 25% thinner, or is 10% cheaper etc.

Most smart battery chargers do this. 0% is not really 0% and 100% is not really 100%.

This one goes to eleven.