2Pack 6.0Ah OP40601 Replacement for Ryobi 40V Battery Compatible with Ryobi 40 Volt Battery Lithium OP4040 OP40401 OP4026 OP40261 OP4050 OP40201 Compatible with Ryobi Battery 40V Power Tools (Red)

Mine work fine, hold the power same as the original. I have to smack it on the end to seat it in the weed wacker battery slot but nothing extreme. Mine take at least 12hrs to fully charge for roughly 20-30 mins of non-continuous weed wacking with my small lightweight Black & Decker wacker. Have fun wacking those hard to get at weeds.

I’ve used both of these batteries every week In my Black + Decker String trimmer since I got them. I’ve had no issues. Considering the Black + Decker branded batteries these replaced, I’d say not much could be expected, but the extra battery life in these compared to the OEM batteries for my string trimmer really makes the job easier. Definitely can’t complain about the price.A lot of other comments say they had to sand down or file down some pieces on the battery to get it to slide in all the way. The two batteries I received are just a very, very (very) tight fit.

Some people have the fit issue, read how they solved it. I just give it a little extra push and it fits. Not too hard, no need to break anything. So these do work and charge lasts for good enough length of time. I have a lot to trim so having 2 batteries definitely helps to get it all done in one go. Unfortunately one of the 2 is dying, charges to only give me 2 min of runtime. I'll be recycling it. The 2nd one is still going strong. Bought them not quite 2 years ago, was hoping to get 3 years out of them. I'll buy another set of 2 and see how they do.

As you can see, customer reviews for these batteries are all over the map. I took a chance and ordered them anyway. I'm glad I did! After a few weeks of use, I am well pleased.I can't honestly say that these batteries last longer than the originals - as some reviewers have said - but they definitely last AS long. I do believe they charge quicker than the originals.Here's the main thing you need to know about these replacement batteries: one reviewer said he had to 'slap' the battery into the slot to make it fit - he is exactly right! When I tried to put my new one in, it slid about halfway into the slot and stopped. I eyeballed it and swore there was not a chance it would line up or fit! I remembered the review, 'slapped' it and it went into place...and worked perfectly.Great price, great batteries!

I have 10 of the original Black and Decker 18 volt batteries for our chainsaws and pole saws. They were NiCad and lasted about two years. When a battery wouldn't perform anymore, I would take them down and have them converted to Ni-Hh at Interstate Battery at the cost of about $90.00 a battery. That's way more than I paid for the batteries new. So far I have 7 rebuilt batteries and purchased one of the Black and Decker Ni-Mh at it was about $45. Last year I saw these batteries on Amazon, two for $36. I tried them out and they fit a little tighter in the saws, but work just fine at a super savings!

Working longer than the originals did, but its only been one season. But the originals didnt even last that long. I actually take these camping and rig up a variety of 12v things ( even though these are 18 v batteries) from fans to lanterns. **Diclaimer** don't try this at home I do this because I think I know what I'm doing. Certain Motors can handle the extra voltage until the inevitable voltage drop however light bulbs will burn out because of the extra voltage so wait until the motor has caused the voltage drop and then apply them to your lanterns or other light sources , wait a minute don't do any of this at home this is a disclaimer! Otherwise i can get a good 4 hrs on a fan that slowly dissipates to a stop, and a couple hours on the lantern til it dims to nothing. Then take 'em home and throw 'em on the weed wacker. (The old ones work well for camping too even though they never fully charge, and usually only charge up to 10v and dissipate quickly its still something.)

Bought these batteries to replace the OEM battery's I use with my Black and Decker 18v cordless broom/blower!Original batteries would no longer take a charge after a few years of occasional use! I thought this upgrade to 3600mAh Ni-Mh battery would be a nice improvement over the Ni-cad OEM 3000mAh batteries which were anemic at best. These new batteries were at least partially charged upon arrival so I decided to give them a try. Well they were charged and ready to go and go they did! I got a full 20 mins of high output power on the first of the two batteries I tried. Same story with the second battery, also a beast and after a quick tryout, I put both batteries on the charger overnight (about 7 hours just to insure a complete charge. No noticeable difference in power after charging so I suspect they may have been fully charged from the sender.

I bought two of these batteries to replace the eleven-year-old batteries that came with my B&D weed whacker. After about 8 years of use, the charge capacity of those original batteries started to decline gradually so that I could no longer do the whole yard on a one charge. So, after eleven years of use I bought two of these batteries one year ago. They fit my weed whacker just fine but they are cheap for a reason. After just one season of use, they no longer hold enough charge to do my whole yard. One year! And that's with only limited use because the grass growing season where I live is only about 5 months. So, with one round of yard work per week, that's only 20 uses of the batteries and they can't take a full charge anymore. With a useable lifespan of just one season, these batteries are not the bargain the appear to be. They are very expensive. I do not recommend them.