From the unique technology uses 3 active manufacturer Makita controls collection – the current voltage, and terminal to maximize battery life. It has a 30-minute quick charge, integrated advanced CPU collects data from the memory-chip battery to determine the optimal method and the imposition of a board for forced air cooling to cool the battery during charging life multi-voltage quick charger to maximize – Fees Makita 7.2V-18V slide style batteries Li-Ion/Ni-MH optimal rapid charging system DC18RA Makita LXT Lithium-Ion Optimum load SystemMakita owes its reputation for building power tools outstanding quality of the drive and determination for excellence that began over 85 years as a human being