Originally posted by kadajawi Anyway, it's nice if they give the AA option, but IMHO I think it is overrated, and giving it USB charging capabilities with a common cable would be, IMHO, a much bigger advantage
The problem is the USB Battery Charging spec is only for 5V at 0.5-1.5A 2.5-7.5W. The Pentax battery chargers output 8.4V at 700mA.
USB Power Delivery V1.0 was finalized in July 2012 can deliver up to 12V 3.0 A, 60 W 5.0 A, 100 W and requires "PD Aware" Cables (type-A and B connectors) and PD compliant hosts. So you'd have to upgrade your charging devices to be USB PD compliant as well as having the proper cable..
USB Power Delivery V2.0 was not finalized until July 2014 which requires USB 3.1 which uses the new Type-C connector. So you would either have to upgrade your charging devices to USB 3.1 or have a standalone USB 3.1 charger.
I don't know about you but I'd rather take the battery out to charge it. That way you can just swap in a fully charged battery and not wait for hours for the battery to charge. You also don't have to worry about heat issues from the charging battery damaging both the camera and battery.
---------- Post added 02-11-15 at 06:41 AM ----------
Originally posted by THoog Probably only front. Only the "metal body" cameras (K-7/5/3) have had rear IR sensors so far. That seems to be one of the product level differentiators, like the battery grip.
As I recall some of the previews and reviews mention the IR port on front and back.