If you want to know how crucial battery life is as a selling point for smartphones, consider this fairly recent development: Even foldable smartphones are beginning to focus on lasting longer on a charge.
That may seem like one of the key things a smartphone should do, but it wasn't always the case with the first foldable devices. Those early models emphasized design — rightly so, since the first step in convincing people to buy foldable phones is to convince them that the phones are going to open and shut dependably. Battery life was seen as one of those sacrifices you had to make for a screen that folds in two.
