One of the main reasons I purchased the CORE battery was because of its alleged ability to be managed and optimized via the Petzl OS software.
Unfortunately, the software doesn't work. At all. I've tried on multiple computers, running various versions of Windows (XP and 7), and the problems range from the software hanging during the install process but never completing on one machine, to installing but then not doing anything (not recognizing the battery) on another.
I'm really disappointed in Petzl for releasing this buggy piece of not-ready-for-primetime beta. Don't buy a CORE, unless you just want a run-of-the-mill rechargeable battery.
I'm giving it 2 stars, because it's just a battery (and an expensive one, at that), and not a "smart" battery, as advertised.