Truly a multi-talent: Dual bay, multi-voltage and USB all-in-one fast chargerDual bay: Two charging bays: One for 10.8/12 volt and another one 14.4/18 voltAdditional USB charger integrated: Fast-charges your smartphone or tablet with 2.1 A charging currentFast charger: Charges one battery after the other (sequential) with 3 A charging currentFEATURES:Battery 100% compatible with all tools within its voltage class. Choose the XL battery for longest runtime or the compact battery for best handlingUSB charger