Both versions of the chargers shown will do the job. The basic ones from All-battery and similar are simply chargers, with a red/green light and offer no other info such as level of charge, amount of current, peak voltage etc.. The Maha unit is also an analyzer, conditioner and discharger, with a digital display . I first discovered this charger more than 5 years ago from the camera industry and have been offering them ever since-sold hundreds without trouble , however, it is about to be discontinued for a newer model. Ideally one could have one of each, the simple unit for quick general use, and the Deluxe Maha for max peak charging, conditioning etc.
Jonathan/EMW