Built-in Memory Chip: Memorizes the usage history & communicates with the charger
Less Weight: Li-Ion battery weighs 40% less than Ni-MH or Ni-Cd
Anytime Charge: Lithium-Ion batteries have no memory effect and can be charged at any time
Charging Technology: Controls current, voltage & temperture to maximize battery life18V
1.5 AmpsBDF452HWImage shown may represent similar item