RE: battery chargers???
you need something like a brain from mrc or something similar, usually with a digital display. even with these type of chargers you need to check out the settings since it can sometimes think that is a different pack and charge at a higher amperage setting. That charger will charge a hump pack, just need to select what your charging, for a digital display charger, you will be spending over $100 usually, drop him an email, he may have something in his store that is what your looking for.