Every year Apple introduces a new iPhone, and every year I get my hopes up that this will finally be the model that can go two or three days without needing to be recharged. But according to a lithium-ion battery expert, the odds of Apple adding a power source capable of boosting iPhone battery life like that are practically zero.
Dee Strand, chief scientific officer at battery research firm Wildcat Discovery Technology, says the throughput on smartphone batteries is rapidly improving every year. The problem is, new features are bogging them down.