A great replacement for your base charger when it goes out - A great solution when the base is in a difficult position to reach. Charges a penant battery 4 times faster than the base charger - Capable of charging 2 batteries simultaneously This charger recharges lithium, NiMH and NiCd batteries. The electronics detect the inserted battery Adjusts the charging behavior. The LEDs indicate the charging status of each battery 3 Color LED displays charging progress for each battery. Automatically detects battery status and selects the appropriate voltage and charge mode Product Description Product Description If your battery charger is no longer working or if you just want a charger to quickly charge your pendant batteries, this is the answer. This charger is a universal, automatic smart-charger compatible with almost all types of rechargeable batteries thus eliminating the need to own several chargers. This charger is able to automatically identify Li-ion, Ni-MH and Ni-Cd rechargeable batteries and apply an appropriate charging mode (Constant Charge Current (CC), Constant Charge Voltage (CV) and Trickle Charge). Each of the chargers two micro processor-controlled charging slots is capable of monitoring and charging batteries independently. Additionally, yellow and blue power/charging status indicator lights could visibly indicate battery status and charging process. i2: The all-new highly advanced smart charger. It's as simple as insert, detect, and charge. From the Manufacturer