The Nitecore Q4 is a charger that's easy to use, versatile, and it's got a fast 2A charging for up to two slots, and 1A charging for three or more. The charge status is a simple LED that turns green when batteries are at 4.2 volts. It accepts the most popular size batteries, including 18650, 20700, 21700, and 26650.
Specifications
Dimensions: 125.4 mm x 95.6 mm x 36.2 mm
Weight: 150.3 g
Capable of charging 4 Li-on batteries simultaneously
Monitors and charges each slot independently
Charging current: Two charging modes (constant current and constant voltage)
Auto detects power level and selects appropriate charging mode and voltage
Auto stops upon charging completion
Overcharging protection
Reverse polarity prevention and short circuit protection