Curretnly I've a Human BrailleNote as a Braille display on my iPhone, however because of portability especially, I'm wanting to get a Qwerty Bluetooth keyboard (Logictech 380 model); by portability I mean for instance, I'd need to carry my Apex, plus the cable&charger, whereas with a bluetooth keyboard, I'd need oly the keyboard itself, since it runs on AA bateries. Thus the question is is it worthwhile buying myself a qwerty Bluetooth keyboard when the BrailleNote Apex already works as kind of a Bluetooth Braille keyboard? How long should the Apex battery last before needing to charge? because it's recent that I'm starting to use the Apex as a display, and I always use it plugged into the wall. Thanks for tips/ideas on the subject.