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

Bought these after my 5 or 6 year old factory Black and Decker batteries for my weed whip wouldn't hold a charge anymore. I've used these new ones a handful of times and they allow me to walk all over my few acre yard taking care of edges and borders again. I don't continuously use them, rather walk from tree to tree or cleaning up around various flower beds and buildings. They charge perfectly fine with the original black and decker charger that came with my weed whip. Glad to be able to take care of everything in my yard again. Good buy for the price from what i'm seeing at this time.

Love the new batteries. They do take quite a while to charge. Like that I got two for a great price.

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.

So far these have performed as expected. They have replaced a pair of eom 1.5ah for my hedge trimmer and blower with very positive results. No longer a need to change battery in middle of a chore.

Seem to work fine, and last longer than my old ones did when they were new.

Don't be fooled by the 4.0Ah claim. This battery doesn't last anywhere near as long as my 3.0 20V Black and Decker battery I was trying to replace.

These batteries have held up great in comparison to the name brand batteries and at a much better price. The key to Lithium batteries is to not totally deplete them before recharging. Also, do not leave the batteries in the tool when not in use. I have learned my lesson over the years. I actually bought these batteries last year and these are still going strong as when they arrived. I also bought the Biswaye charger that also works well. However, I only fast charge when it's absolutely necessary. I highly recommend these as a good B+D replacement.

Exactly as described. Both the batteries work great used the weed eater with them yesterday. The batteries really work a long time.