Large voltage drops under load are typically an indication of a bad cell or battery. You could argue this is beneficial to the customer but Apple is hiding the

Large voltage drops under load are typically an indication of a bad cell or battery. You could argue this is beneficial to the customer but Apple is hiding the fact that they're doing this. Why? I recall when they switched to non-replaceable batteries in MacBooks, they boasted how their battery lives were the best and would last x years. Is this how they did it?