Makita BL1815-2 - 18V Li-Ion 1.5Ah Battery 2-Pack
These new 18V batteries has a built-in memory chip that memorizes and communicates with the charger. The battery has no memory effect and can be charged at any time. The charger controls current, voltage and temperature to maximize the life of the batteries. They weigh 40% less than the Ni-Mh or Ni-Cd batteries.
These batteries are compatible with Makita BDF452HW.