BL1850B 18V 5.0Ah Li-ion Battery

The Makita BL1850B 18V 5.0Ah Li-Ion Battery provides the ultimate power to weight ratio thanks to the lightweight and shock-absorbing design. The Li-ion range delivers 430% more working capacity during the lifetime of the battery compared to NiCad and is 40% lighter than NiMH.
The Li-ion has minimal depletion of power during use or in storage over its lifetime.