Originally posted by hjoseph7 The battery on my K-5II drains pretty quickly when I use a manual lens. I would think an AF lens would draw more power but apparently its the other way around.
Did you start with a fully charged battery?
Pentax battery meter is not very accurate as other have mentioned, and a manual focus lens should put less load on the battery.
So when using a MF lens the battery meter might indicate fully charge much longer than with an AF lens, (even when the battery is almost depleted).
My K7 can behave strange sometimes. When turning on the camera it might show fully charged, but if I try to use live view it will show "battery depleted"