MakitaBL1850B-2 18V LXT Lithium-Ion 5.0Ah Battery, 2/pk, Black

I’ve had these Makita batteries for over a decade, and they still charge well and work reliably. I truly love Makita tools — this product has proven to be both durable and dependable over time. A great investment for anyone looking for long-lasting performance.

These Makita batteries are excellent. The charge lasts a long time, and I’ve been using them for years without any issues. They’re very durable, and I will definitely keep buying them.

This 5 AH appears to be same size and weight as my old 3AH Makita battery that was starting to show weakness. I popped it in the charger and it was ready in about 45 min. Zero bars charge out of the box - but all topped off now. Gave it a try in the Makita circular saw and works well. Satisfied with my purchase. Haven't tested the power vs the 3AH nor the duration of the charge but I expect it to be excellent.Love the addition of the charge level meter - makes it easy to pick up and see if its ready to go. A little more than a Dewalt OEM 4 AH i got recently but still in the ballpark of what OEM's cost these days at around $80.Pleased with purchase ... I now have to be careful I don't go and justify additional Makita tools to use the battery.

I have nothing but nice things to say about this battery. It is almost identical in dimensions and weight to the BL1830's, but adds an additional 2 amp hours of runtime, the battery capacity gauge, and Star protection. The battery capacity gauge works well. Activating it requires depressing a small push-button switch on the back of the battery. This is a plastic "bubble" style magnetic switch found on devices like kitchen timers. This style of switch is not the most durable, and seems to be the weak link in what is otherwise a very well-made product. So far so good, though, so perhaps this will not be an issue over the life of the battery. Star protection is Makita's name for an internal circuit that will not let you overheat the battery, or run the battery down to such a complete state of discharge that it cannot be recharged, which can be an issue with some lithium battery systems, like Makita's own BL1830 batteries.The best feature of this battery over an 1830 is the warranty: 3 years instead of just one. That makes this a pretty reasonable investment for any regular user. Also note that the additional capacity should mean fewer recharge cycles, and thus longer life.While I have nothing but nice things to say about this battery, I do have some less-nice thing to say about Makita. The Star protection is great, but they sold non-Star tools and batteries for a number of years, leaving a lot of customers such as myself with a significant investment in these products. While Star protection is marketed as a feature of the new generation of tools and batteries, a more honest evaluation would be that Makita sold a tool/battery system with a significant design flaw for quite a while. This battery represents what is essentially a totally different battery system. It looks the same, is still called "LXT," and uses the same chargers, but it is physically not compatible with the old tools without warranty-voiding modification. If you have non-Star tools, you can easily take a chisel to the small tab that prevents this battery from mating with them, and this battery will power them just fine. However, this modification definitely voids the tool warranty, and might void the battery warranty as well-- these batteries do contain a memory chip, and I have not been able to find any definitive information on whether or not they log interfacing with a non-Star tool. It also means that the battery will not be protected by the Star circuitry when using that tool.I am currently "playing it safe" and using this battery only with my Star tools. I'm not quite sure what I'll do if my non-Star tools outlast my dwindling BL1830 fleet. As much as I love my Makita tools, unless Makita offers some kind of trade-up program, I have a feeling that the solution might be yellow and black.

After a couple of years in advanced homeowner class use, I have put these through the paces for long enough to share opinions. Overpriced, but they do perform. I have an older generation tool set (~ 2007?) and was able to modify them to accept these type batteries. Have had zero issues. Love the longevity and charge meter on the 5.0!

4 starts only because mine was not sealed in original packaging. It was in a ziplock bag like the kind you use in your kitchen. No where in the description does it say this is a open item, returned, or refurbished item. so 4 stars. The price & quality of the battery saved this review.Battery looks new. No scuffs or marks showing use.Battery charged and works as it should. I tested it hard in my weed trimmer and it easily out performed my 4Ah OEM battery.Battery is identical to my expensive OEM Makita batteries. I cant tell any difference in any way.I Will buy more of these.Not sure why it did not come in OEM packaging. Not sure where these come from or if they are refurbished or open returns. They do perform as they should and the price is excellent.

Oem battery.

Well as far as I can tell these are real Makita. There sadly is no real way to trust any of these sells I guess, but who the heck wants to pay MSRP at Home Depot! These batteries are a rip off no matter if they are OEM or fake. Guess we need some regulations somewhere. I'll see how they charge and hold up.