GP ReCyko Everyday Battery Charger B421 (USB) + D

The B421 charger charges four AA 2100mAh batteries in six hours via a USB connection. You can monitor the charging process through LED indicators that show the charging status and whether disposable or defective batteries are inserted. Another safety feature is an automatic stop timer and Negative Delta V function, which stops charging when the battery is fully charged, preventing overcharging, overvoltage, short circuiting and reducing battery life.The D451 charger station is an advanced charger for your ReCyko charger that provides key information about your batteries and makes charging easier than ever before. The unique space-saving design of the station keeps the ReCyko charger vertical and powered by a USB connection, making it perfect for home or office use. When connected to chargers, the LCD display on the station shows each battery's charge status as well as their condition and reminds you to replace old batteries.Charging time (Input power DC 5.0V 1.0A min 2 pcs of batteries):-2100 mAh AA battery - approx. 360 minutes-850 mAh AAA battery - approx.180 minutes4 LED indicators:-Green LED lights up for half a second when USB power is connected-Charging - Green LED blinks slowly-Fully charged - Green LED lights up-Defective/disposable batteries inserted - Green LED blinks quicklySafety protection:-Timer protection –8 hours -Negative Delta V function detects when battery is fully charged