This set is the 1.5ah version of the DUH523RF. The new Makita DUH523 Hedge Cutter replaces the BUH523 and is now fully compatible with 4.0ah and 3.0ah batteries. Features of the DUH523 18v Hedge Trimmer: Lithium-ion battery lighter weight quicker charging and with more run time than an equal voltage Ni-Cad or Ni-MH battery. Rubberized soft grip provides comfortable and sure grip. Stain-free shear blade surface of glittering silver obtained by non-electrolyzed nickel plating that features high anti-abrasion surface for long lasting coating Anti-vibration structure consisting of Motor-crank section and handle section linked by 5 cushions to absorb vibration from blade and motor-crank section User-replaceable blade The blade can be removed without disassembling housing. Battery capacity warning lamp Blinking red; Battery power has been nearly used up. Solid red; Battery power has been used up (Battery protector will shut off the power.)