This battery and charging set by Makita® is ideal to charge many bulk tools. The dual-port rapid charger charges 2 18 V lithium ion batteries simultaneously. The batteries will be charged in just 45 minutes. The charging system incorporates 3 active controls (current, voltage and temperature) that provide an optimal charge and ensures batteries cannot be over-discharged or overheated during the charging cycle. The central processing unit (CPU) in battery communicates with the charger to analyze battery and charge according to its unique condition. The device indicates the condition of battery and current charge level (-80%, +80%, 100%) with the digital power display. The set includes 2 18 V lithium ion BL1850B (196675-2) and 1 rapid charger (DC18RD) and it is backed by a limited 3-year warranty.