I never tried that but have made an adaptor to use my Worx 18-20V ion batteries on my B&D tools & used them for years w/o any problems. I took an old B&D 18V battery case w/o battery inside, & mounted an inexpensive Worx charger to it (just the socket). Soldered the + to + & - to - terminals together. Worx 20V ion batteries are light, cheap & very long lasting. I even use it on my B&D chainsaw & hedge clippers & never a problem. When I notice any reduction in power, I change batteries before it gets too hot. I have some pictures of the assembly.