Universal Smart Battery Charger 4 Bay for Rechargeable Batteries NiMH NiCd AA AAA C Li-ion LiFePO4 IMR 18650 21700 20700 26650 14500 16340 18500 10440 18350 RCR123a LCD Display UL Listed

We bought this to charge 18650 batteries for our vapes. There are 4 individual battery chargers and they work independently of each other. This means you can have various battery sizes in each one and they'll all charge. I also like the cut off function that stops when the battery is fully charged. The charger is super easy to use, no set up, just plug it in and go. It does change the display to show the mAH, voltage, and charging percentage for the battery. Haven't had an issue with it yet and it's been extremely useful for us as we keep 4 batteries in it charging and just swap out throughout the day as we need them. One last callout is that buying something like this at a vape shop would cost you 50%+ more from what I've seen. Great deal, in my opinion.

This smart charger is really what you need for charging any type of rechargeable batteries. Simple and reliable to use, automatically detects on each independent bay the type of battery cell and the corresponding customized charging method. I have combined charging at once NIMH, NICd, AA & AAA with Li-ion 18625. It has remarkable features like: you can adjust each bay independently to 500mA or 1000 mA current (default is 500 mA), you can combine any different type of battery (Chemistry, Size) on each bay, automatically stops when a bay is fully charged (Shows alternate for each bay time charging, current and voltage) at this step you will see zero current, then you just can remove the battery of that bay and wait until the others so do the same with zero current. This means that if for some reason when fully charged each battery you are not removing right away, since current is automatically shut off at full charge; there is no risk of overheating or damaging the cell and remains just sitting on the bay with no added energy et all. In summary, fully recommendable, reasonable price, robust design and sort of minimalistic and elegant design, reliable and fast charging (around 3 hrs for Li-ion 18625 from zero to full crage, less than 1 hour for AA or AAA NIMH / NICd from empty to full charge). Just some warning for not you to be afraid that the Li-ion rated 3.7V batteries end up with 4.2 V at full charge and the rated 1.2V NiMH / NICd end up with 1.5V. This is quite normal and does not cause any harm to batteries, see on questions and anwers how this has been clearly explained. Enjoy this purchase.

I'm normally bad about doing reviews, but I've had so many bad experiences with battery chargers that when I finally got one that worked and worked consistently without fiddling with it, well, I just had to say something. Making this one even better is the information provided by the readouts. Rather than some blinking idiot light, it actually tries to give you information on a per cell basis about charging current, voltage, and charging time. I don't know, or especially care, just how accurate those numbers are, but even in relative terms it's a win. I've only had this unit for a few months and used it less than a dozen times, so well have to see about it's long-term viability. But it seems quite well made and I have hopes that it will be around for a while.

After reviewing other good chargers on Amazon & elsewhere (so many choices!) I bought 3 of these in 2018 and I'm content with my purchase, they work great for me. And since a dead battery can often recharge within 30 mins, I don't think they're slow, they work fine. I'm not sure what a couple negative posts were talking about, because I also charge a BIG battery from a vape, so big it barely fits in the slot... I put in an outside slot & I see no reason it can't hold 4 of those big boys if you wanted. Although you're not supposed to, I've even put regular akaline batteries in it, mostly at first just to see if they're charged or not, since the flashing numbers tell what the battery voltage is & the bars show the charge.. but a couple times they showed half charge & I let them top off & only took maybe 10 mins. I did that again today & one of the Duracell alkalines showed 1.5v, but the other one only showed .87v even though both showed fully charged, so I tossed that one in the recycle bag. So this also makes for a handy battery volt meter & especially for under $30, I think its a great little charger and glad I got 3 of them. You know the saying... "One is none & two is one" ...just in case the 1st one goes caput some day, plus I decided adding a 3rd one to my preps would make great trading stock someday. ; ) P.S. The only thing it doesn't include is a discharge option, but from what I hear, only certain users that constantly top off their batteries really need that option (to prevent memory, right?) and that's not how I use batteries, so no biggie for me.

I bought some tactical flashlights that came with chargers, and they didn't do the job to charge the batteries. The "free" ones were very underpowered, and since I got these, I have not had any issues keeping my batteries charged. I own a "kill-a-watt" that I love to use to keep an eye on things I charge, but this tool does something similar by helping me keep an eye on every battery individually, and that is helpful so you know when how your batteries are aging, and you can tell when the batteries are nearly fully charged. Great tool. If I bought a tactical flashlight as a gift, I would have to buy one of these to go with it because it does such a great job. It also looks high quality, and I believe it's built in the US in City of Industry, CA which is even better and arrived quickly.

This is the second unit I purchased from this manufacturer. The other one is a 2 slot charger. These units give me all the information I need to manage the state & condition of my batteries. It also has the ability to charge at a higher rate if I need a quick charge. I can also use it in a car using the DC charge cable.