Nitecore Digicharger D2 is a universal battery charger and is compatible with all the cylindrical rechargeable batteries around the globe, meaning that you no longer need to own several chargers. The D2 automatically identifies the battery type like (Ni-CD, Li-ion and Ni-MH) and it is also capable of charging LiFePO4 batteries with its manual selection option. Through the smart charging circuit selection it chooses the best mode for a given battery.Each of the two mini-computer controlled charging slots charges and monitors the battery.