A user replaceable battery isn't free: 1. It restricts the size of the battery Lithium polymer batteries can be molded and shaped to fill up all available spa

A user replaceable battery isn't free: 1. It restricts the size of the battery Lithium polymer batteries can be molded and shaped to fill up all available space inside the case. A replaceable battery can't be shaped to nearly that degree. Making a battery user-replaceable means it must be smaller. 2. It doubles-up the case There is no way you can legally sell a product with an unprotected Lithium battery, especially not one that is laptop-sized. It would be a massive safety hazard. You need an internal case for the computer and an entirely separate case for the battery. That takes up space and adds weight. It also further restricts your ability to shape the battery to fill the available space (meaning the battery must be smaller or the case must be larger). -- There is no magic in battery technology. We aren't going to wake up one day and have computers as light as a piece of paper that last all day. It requires constant iteration and improvement. If everyone listened to naysayers it would greatly slow down the pace of innovation. I am absolutely certain there are still people out there angry about the removal of RS-232 serial ports or VGA ports on laptops. Probably a few still upset about removing floppy drives too.