It's a nice solution idea, but leaving Bluetooth on all the time must eat quite a lot into your battery runtime. I have a hard time using a phone when the battery is drained. I can run for maybe an 3-4 hours on a charge if I'm actively using my phone, and that's with all manner of power saving options turned on, doing their best to maximize my *useful* runtime. The industry insists on super thin, but large surface area smartphones, but I'd give just about anything for something pocket size, 90% battery by mass, and with a slide-out physical keyboard. If it were an inch and a half thick, but could provide a solid 14 hour active use time on a single charge, I'd be in love with it.