Originally Posted by Denis
Ordered a spare battery for my K10D the other day. This is as close to the Pentax D-LI50 specs as I could find. The EDMNOO2K, replacement for NP-400, is 7.4 volts at 1600mah versus 1620mah for the D-LI50. Works perfectly on the K10D including continuous shooting mode. It only cost me $30 cdn with shipping and handling, not bad versus $99 cdn in local camera stores. It is supplied by "www.espow.com" but I purchased via "www.electronic-accessory.ca" web site.
If you are looking for a spare, it might be a cheap way to go.
Denis - I've heard / read / seen of a number of people who had trouble using the NP-400 in their K10D due to the reduced mah. For some reason, some K10Ds will work with the lower mah batteries, and others refuse to. Not sure why that is. I know here in the states you can now get 3rd party LI-50s that have the higher mah. I'm using a Promaster one as my second battery, and is working great!