This may not work... or it may :/
When I worked at a shaver shop, we repaired batteries within the rechargable shavers.
When we'd get the Norelcos in, people wouldn't want to pay the high price to replace the batteries. We would tell them to stick them in their freezer for 24 hours (after fully discharged) and then to wait 24 hours after bringing them out. Then to once again plug them in and charge for 24 hours.
Sometimes it helped to reset the memory of the battery. I can't promise it would work on an ecig. But, seeing as the PCC is such an integral part of the eRoll, I hope for you it does work.
If not, and you are gonna toss it, throw it up on ebay, I'd bid on it. I'm looking to get my hands on a few dead batteries. I am seriously wanting to do some modding. Try to create a desk charger and a larger case/charger to carry a battery, bottle of juice (3ml) and maybe a tank or two. (That seems to be what most of us are wanting when I read the thread. Perhaps a secondary battery, depending on what I work out... who knows. I haven't had one die on me yet to pull my own apart.)
Otherwise, I personally love the eRoll and I feel for those of you that didn't get good units. Even getting mine used it's great!