Biswaye 4.0Ah 20V Lithium Battery LBXR20 Compatible with Black and Decker 20V Max Battery LBXR2520 LBXR2020 LB2X3020 LBX20 LB2X4020 LBX4020 and LST522 LHT2220 LST300 20-Volt Max Tools (2-Pack)

I use these all summer long and they perform well. Good value and quality Battery life and charging time is as you would expect from a well made product. They work with all my Black & Decker products (chainsaws, trimmers, and drills).

Just what I needed to boost power in my "old" trimmer. It seems like the new batteries are more powerful than the old one. Having two allows me to finish my trimming/edging. When I had only one battery I would run out of power just short of finishing the job. I only wanted one battery to have an extra but felt forced to by two since most were offered in packs of two. I'll set the original battery aside for an emergency and use the new ones to do my trimming. However, very satisfied. (Make sure you know your model # before you buy.)

Haven't use them enough to say how they last, but they charged and work like they are supposed to. I recommend them because they seem to be a good value.

Why did you pick this product vs others?: After about six or seven years of use, the original batteries for my Black & Decker weed whacker finally got to the point that they wouldn't hold a charge for very long. I purchased these and am happy to report they fit both the tool and the charger, however, one of the batteries isn't holding a good charge. It lasts about as long as one of the better original batteries after fully charged. I haven't tried the other one yet, but I noticed even the two original batteries held charges differently, so I'm happy enough.

Seems great so far