The Datamation DS-16BY-BC-E5/6-20 is an advanced ETL listed battery charger that can simultaneously re-charge up to 16 batteries (6 cell or 9 cell) for Dell™ Latitude™ E5420, E5430, E5520, E5530, E6420, E6420XFR, E6420ATG, E6430, E6440, E6520, E6530 and E6540 laptops. Working with engineers with more than a decade of battery technology experience, we can now provide a compact, effective recharging strategy for organizations that want to maintain extra batteries for classes, training facilities, etc. This new charger makes use of the Dell batteries’ smart charge and quick-charge features and contains two bays that can be used to completely re-calibrate batteries, helping preserve their effective life and optimum use.