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 D2's two microcomputer-controlled charging slots then monitors and charges the battery independently. Furthermore, an integrated digital LCD screen displays charging progress, voltage, current and time while an intelligent automatic power-off function terminates the current when charging is complete. The Nitecore D2: The world's most advanced fully automatic digital charger. It's as simple as insert, detect and charge. Features Capable of charging 2 batteries simultaneously Each of the two battery slots monitors and charges independently Compatible with and identifies Li-ion (26650, 22650, 18650, 17670, 18490, 17500, 18350, 16340(RCR123), 14500, 10440), Ni-MH and Ni-Cd (AA, AAA, AAAA, C) rechargeable batteries Optimized charging design for IMR batteries Integrated LCD panel displays charging parameters and progress Two conveniently located side buttons allow easy selection of specific battery types and charging parameters Intelligent circuitry detects the battery type and status before entering automatic charge mode (CC, CV, dV/dt) Automatically detects battery power status and selects the appropriate voltage and charge mode (with the exception of LiFePO4 batteries which require manual selection) Compatible with LiFePO4 batteries Compatible with small-capacity batteries Automatically stops charging when complete Features reverse polarity protection Designed for optimal heat dissipation
