A user-removable battery imposes a significant cost. As devices get smaller the cost is correspondingly higher. Adding a compartment means extra weight to stren

A user-removable battery imposes a significant cost. As devices get smaller the cost is correspondingly higher. Adding a compartment means extra weight to strengthen the device. Plus a cover strong enough to keep out water. Then the battery itself needs to be encased to protect it, lest putting it in your pocket causes a key puncture that sets your pants on fire. Those costs are mostly fixed and would be a larger proportion of the overall thickness and weight in a modern phone. It also means you can't use a split battery, L-shapes battery, or exploit any other spatial dimensions to pack in more battery... at least not to the same degree. Is having half the battery life, or a phone 60% thicker worth it?