Originally posted by adsouza I suspect the K-01 is battery sensitive, I recently acquired mine from Adorama as a kit with a Power2000 spare battery. Charged the original OEM battery that came with the K-01 and used if until it needed to be recharged. Inserted a fully charged Power2000 battery and the K-01 operated fine. Recharged the OEM battery and inserted it once the Power2000 was depleted.
Switched K-01 on, everything worked OK, but as soon as I fired the first shot the camera would freeze and shutdown. Replaced the battery with Power2000 and all was well, recharged the Pentax OEM battery and inserted into the camera, it would turn on but once the shutter release button was triggered it would freeze and shut down. This kept repeating itself until finally the K-01 Pentax OEM battery would not even turn the camera on at all but the Power2000 would work like a charm.
In frustration, I took the K-01 into Pentax for warranty service and they ended up replacing the Printed Circuit Board and Shutter and I was told not to use the Power2000 battery only to use it in extreme emergency when no Pentax batteries are available. Hence I suspect the K-01 is battery sensitive. The Power2000 is 7.4V 2100 mAh and the Pentax OEM battery is 7.2V 1860 mAh.
I'm not a camera repairman so take this with a grain of salt if you must, but I do know electronics. The symptoms you describe sound like the Pentax battery was bad and wouldn't hold a charge. I haven't run my K-01 battery all the way down yet, but I have several times in my Q. On the Q the camera will shut off when the battery is depleted but you can still turn it back on and get a shot or two before it shuts down again. I've done this for up to 20 times before the camera just wouldn't turn on anymore. I've had other cameras (non Pentax) exhibit the same behavior you're talking about with a depleted battery in that they lock up on shutter press until after a few tries they no longer come on anymore.
As for the difference in the two batteries, the amperage makes no difference in operation. And all modern electronics have regulators to take care of voltage differences. So functionally, the batteries are the same.
So even though Pentax replaced the board and shutter, did you keep the original battery or did they replace that also? I'm just curious so I can make sure what I
think I know is what I
really know
I'm always open to learn something new!