Nitecore Digicharger D2 ChargerNitecore Digicharger D2 Charger The Nitecore D2 is a universal smart charger compatible with almost all cylindrical rechargeable batteries, thus eliminating the need to own several chargers. The D2 automatically detects Li ion, Ni MH and Ni Cd batteries, and through manual selection is also capable of charging LiFePO4 batteries. Intelligent charging circuitry selects the optimal charging mode (CC, CV and dV dt) for a given battery and each of the D2s