This is a tangent to the original point, but I'll play. Apple iPhones have long had some of the highest battery lives of smartphones on the market despite having some of the smallest batteries. Since they only have to worry about a single OS, they can optimize away to achieve this. Smaller batteries means less environmental harm, lighter phones, and more space for other parts. There are endless reasons to bag on Apple, but the fact that they can achieve much better battery life with much smaller batteries is not one of them