Originally posted by Gian Can I store the new unused batteries without charging them?
What I remember reading is that, stored at a normal temperature (a cabinet, as opposed to somewhere in the sun) and partly charged (say 50-80%) is the best way to reduce how much the battery degrades over time. You could need them in 2-3 years and they'd work just fine.
Originally posted by Gian my camera AF is really off focus with all my lenses
Have you tried micro adjusting focus? Older cameras such as the k10d don't have that function, I'm guessing yours may be since you didn't mention using live view. But if your camera supports it, it can really help. If not, the next thing to try is using a hand air blower on the AF sensor (under the mirror, look up on the forum or youtube). Do not use compressed air from a can. If dust gets on that it can affect focus accuracy. If that still won't do, then service is probably the way to go, perhaps the af sensor got misaligned.