Back when I was carrying my Nexus S around, I would have happily paid $50 more for a model designed to contain a double-sized battery. [0] My hands tell me that

Back when I was carrying my Nexus S around, I would have happily paid $50 more for a model designed to contain a double-sized battery. [0] My hands tell me that the battery is quite a bit less than 25% of the total weight of the device, so the weight cost would also be quite small; no more than ~1.5 additional ounces. It's not a rule that one has to choose between a relatively small phone with shitty battery life and a phablet with somewhat less shitty battery life. One could have double or triple-sized batteries in the smaller phones! [0] The problem with all of the aftermarket batteries that I saw was that they required a new back cover that contained no NFC antenna.