That's nice. I want one of those Cigarette Boxes that recharges the battery sticks for the Janty Dura-C but the downside is that the review I heard said one has to unscrew the battery when it's charged or it will run down the battery within the pack.
Now please tell me what ..... engineer was unable to come up with a way to switch off the battery section that was at a full charge, leave the battery stick still charging on, then flip it off when it's fully charged so one doesn't open their pack to learn that not only is their pack lost its charge but both batteries or how ever many it holds have lost all their charge too? I just wonder about some of those engineers sometimes. It seems that the average Joe with some commonsense (you are in that group of people) can come up with a perfectly working product without a 4-year degree in master engineering yet those working to design these packs can't do the same thing you did using spare parts and a little know-how. Maybe they need you to go teach a few classes for them so they can learn to think in that manner.
Kudos for the mod!