DEWALT 20V MAX 4 Ah Lithium Ion Battery 2-Pack (DCB240-2)

I'm very happy with these batteries, and I've been using then for probably a year. The size and weight is far less than some of my other DeWalt batteries, but the capacity is every bit as good as it claims to be. When the batteries on my cordless tools needed replacing, I decided to switch the whole kit over to DeWalt. That was because of the high quality of the few DeWalt tools I had, and the fact that I could buy one set of batteries to share across all my cordless tools. It turned out to be a very good decision. The DeWalt tools and batteries perform significantly better than what I had before--and those were quality tools! The batteries fit flawlessly across drills, impact drivers, angle grinders, and vacuums. Yes, the brand sells at a premium price, and yes you get more quality and performance for that price. I use my tools frequently and often for hours at a time. To me, the tools in general and these batteries in particular have proved to be worth it.

Typical quality Dewalt product. Powers tools for long time.

So much better than the knock offs! They last longer and they are lighter. Sometime it pays to pay just a little more!

Got these batteries for my electric chainsaw so that we could trim all the trees in our back yard. The batteries worked perfectly and held a charge for a few hours of constant use.

Worked great! Just what I needed!

Full of Energy

Great price

Excelent

Hi quality, typical from DeWalt

Las pilas estan geniales, si le hacen merito a que es la version compacta, tengo la de anterior igual de 4 y estas si estan mas chicas y tienen una forma mas chida, me gusto que vienen fechadas a 2025

Buena duración y relación precio-calidad

Got these on one of Amazon's flash deals.. Was a bit concerned reading reviews of people getting "new old stock" batteries made years ago, but I thought I'd take a chance and got genuine Dewalt batteries, Feb 2025 mfg date. Charged and tested them on my balance charger and they have full capacity and work fine.

Really good battery, this has the bigger/better 21700 cells which provide a higher discharge rate. I'll only buy batterys with those cells from now on, 4ah compact, the 6ah, 9ah FV & 12ah FV, I believe are all 21700 cell batteries. 1st test was on my sawzall, noticable difference in power compared to the 5ah. But it's a trade off, more power with the higher discharge rate, battery doesn't last as long. Have one at work to use on the 923 & 900, woke the 923 right up. It has its place in the tool collection though, sander, osolatting tool, jigsaw, probably not a big difference. We're spoiled now, not only do we have the right cordless tool for the job, but now we can match up the right battery for the job, power or run time. Planning on buying more as my 5ah's die off.