Hitachi CR18DL 18-Volt Li-Ion Reciprocating Saw Kit  (Discontinued by Manufacturer) Lithium-Ion battery weighs 40-percent less than Ni-Cad and has 3-times as many charge cycles Tool-less blade change for quick blade changes Quick cutting speed with the 1-1/8-inch stroke No load speed is 0-2,100-SPM Comes with Hitachi's lifetime Lithium-Ion tool warranty Long lasting 18-Volt Li-Ion Batteries 0-2,100 spm 1 1/8-Inch stroke Tool-less blade change 3.0 Amp/Hr. batteries for long run time