Peter Bomberg
Contributor
A similar thing happened with my Olympus Tough 8000 circa 2009 and I found it confusing so I bought extra batteries and used the recharger instead of the USB cord. Back then the recharger was included in the basic kit.
The problem it that adds weight and takes space both of those are a premium for me, that is why I am switching to Inon S-2000's from my D-2000 (lighter and smaller)