I've literally been screaming for replaceable batteries since the advent of the first iPhone. The main issue is that batteries in mobile devices seeing heavy usage typically die in 2-3 years. This isn't a problem if you replace your handset every 24 months which is typically the norm, but when you try using a device for longer, such as in my case using an Nvidia Tegra K1 tablet daily including mobile gaming burning my battery up, my first one had a battery failure in 20 months and needed a replacement as I couldn't simply swap the battery out. Another thing I wish is that I could open it to add more ram and increase it from 2 gb to 4 gb as loading always grinds down to a halt as it keeps running out of ram until I run a speedboost app. I don't want a new tablet as the Tegra K1 would be perfect if it just had more ram, even 3 gb. When the battery in my current one breaks I'll have to replace it then as it's now out of warranty.