The Xtar B20 PILOT II 18650 charger is a two-bay charger designed for Li-Ion/LiFePO4/NIMH battery packs. It is equipped with an intelligent circuit set for each charging slot that automatically detects the battery type and identifies the suitable charging method. The B20 PILOT II charger allows for a selectable charging current of 0.25A, 0.5A, 1A, or 2A, and features over-charge, over-discharge and reverse polarity protections, as well as a built-in circuit temperature monitoring system and 0V battery activation function. The charger is also optimized for charging NiMH batteries, allowing for an 18-hour charge-retention time with an adjustable cut-off voltage. The B20 PILOT II is one of the most advanced and versatile chargers on the market, providing a safe and efficient way to charge and maintain 18650 batteries and other rechargeable Li-Ion and NiMH batteries.