But, the battery chemistry is almost the same across the phones. There is no magic sauce for one phone company. However, bigger batteries generally last longer,

But, the battery chemistry is almost the same across the phones. There is no magic sauce for one phone company. However, bigger batteries generally last longer, because they go through less full cycle refreshes. Getting better battery chemistry is the same order of difficulty as curing a particular cancer! May be you care about cheaper battery swaps, and that is something we all can get behind.