*Yes. It's important to get insulation caps off and get batteries fully charged before using them for the first time. Becasue the batteries only have get 60% charged when left factory.
*It's importand to do like that. The batteries will discharge continuously when storing in charger without insulation caps, and remaining power may be very low even if you have get them fully charged before storing.
*The charger only support li-ion rechargeable batteries, but can't support Ni-MH or other rechargeable batteries.
*Definitely not. The batteries only could be charged with the comed smart charger.
*Because controllers relies on the output voltage of the battery to calculate the remaining power. However, the output voltage of li-ion battery is always 1.5V until power off, and that's why the headset board always shows it still 100% power left.