For about 30 years I am dealing with batteries and chargers; have appointed "worn out" even 30-40 different chargers. This is the only device that really turns off when fully charged. The displays are very accurate, each shaft can be adjusted individually. So keep batteries for longer; Overcharging impossible. Despite easy handling. Convenient for travel bag / 4 adapter (in order to use AA batteries in devices for C / D-cells) are included. PSU quality, does not heat so much. Only the supplied rechargeable batteries are not worth a shot powder. Unfortunately only available for 4 cells. Therefore, I immediately ordered a second device.