Intelligent charging circuitry selects the optimal charging mode (CC, CV and dV/dt) for a given battery and each of the D4‰ۡóÁÌ_åÈs four microcomputer-controlled charging slots then monitors and charges the battery independently. Furthermore, an integrated digital LCD screen clearly displays charging progress, voltage, current and time while an intelligent automatic power-off function terminates current when charging is complete. The Nitecore D4: The world‰ۡóÁÌ_åÈs most advanced fully-automatic digital charger. It‰ۡóÁÌ_åÈs as simple as insert, detect and charge. Features : Capable of charging 4 batteries simultaneously Each of the four 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 clearly 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 over-charge prevention to protect batteries Features temperature monitoring to prevent overheating Made from durable ABS (fire retardant / flame resistant) Features reverse polarity protection Designed for optimal heat dissipation Certified by RoHS, CE, FCC and CEC