Makita's new Dual Port charger (DC18RD) holds two batters but can charge both at the same time because of the X2 system. This system allows 36-volt Makita tools to be powered by two 18-volt batteries.
Thanks to this new system, only one charger is necessary rather than two. In addition to the new system, if a tradesman finds himself with multiple depleted LXT batteries they can charge both in the same time that it would take to charge one:
The DC18RD contains the same technology (it monitors current, voltage, and temperature) as Makita’s standard single port charger. And like that charger, it has a fan, which blows air through the battery to cool it. This allows the battery to be charged more rapidly without overheating and reduces the amount of wait time before a hot battery can begin to be charged.