Originally posted by AquaDome It means don't charge your Pentax batteries in the Wasabi charger. The batteries are built to different standards. While they both provide adequate voltage to power the camera, they likely aren't the same internally. Most chargers aren't smart enough to work well with a battery they weren't designed for.
Looks like very good advice, but I'd still like to know what the heck they are. Maybe I'll get one of my Japanese friends to look at the website and either figure it out or ask people at Ricoh about it.
---------- Post added 2015-11-02 at 08:22 PM ----------
found what looks like the answer thanks to Stevebrot, page two of this thread:
https://www.pentaxforums.com/forums/6-pentax-dslr-discussion/307009-pentax-batteries.html