Intelligent AAA battery Charger,LCD Dispay 8 Bay Universal Smart Charger for Rechargeable Batteries Ni-MH Ni-Cd A AA LiFePO4 Li-ion 18650 26650 26500 18490 17670 17670 21700 RCR123 Batteries

We have bought over 100 of the C4 chargers, they go out to the oilfield with our products for a rough life. We have not had a single reported failure, the chargers are simple to use (or they can do lots of tricks if you want them to) and reliable. We add the DC USB car adapter also from Miboxer and it works great. It has a trick cable, and puts out 12VDC at high current via the USB socket to run the charger at full power. Unplug the trick cable and the socket flips back to normal USB Voltages so customers can use that for charging normal USB stuff as well. This is great for the oilfield since the users dont need another AC inverter just to charge cells; some other brands we tested charge at a lower rate if they are not connected directly to 120VAC.We have tried all the brands out there (see pic) and choose these as they are the most reliable and work well.The C8 we have works fine, its more convenient if you have lots of cells to charge, we usually do 400 cells over a few days so its handy then. The C8 comes with an AC adapter but unlike the C4 it wont operate directly from 120V.These are the best chargers for 18650 cells!

I have so many rechargeable batteries. My assorted flashlights use several different types. My speedlights, assorted toys, video game controller. I have literally over 120 rechargeable batteries. When I'm getting ready for a big photo explore, I need dozens of batteries. So out come several chargers, all holding four batteries. Some only charge AA and AAA.This charger is just SO much better. It holds 8 batteries, and I can mix and match (older chargers actually required pairs of alike batteries) voltages and sizes. The readout is informative and easy to read, and backlights when either button is pressed.The adapter is also designed well - it plugs in sideways and points away from the ground, so only covers one outlet. I have a couple that the adapter covers up two or three outlets on the power strip. Annoying.Very pleased with this charger.

For a gadget with only two buttons, this can do an amazing number of things. I've made a cheat sheet from the instructions to remind me what each button does in each mode, with single press, double press or long press. I put my new eneloop AA batteries in this charger, and the status line (bottom line of the screen) instantly showed me what was going on with each battery as I inserted it. The batteries arrived with 45 - 48% charge, and all six were fully charged in less than two hours.It's handy to get the overview of what is happening with all the batteries on the top line, and you can easily select an individual battery to display charging details on the bottom line. The selection is smart, skipping the empty charging positions.I'm installing a couple of sound systems this fall, both of which have multiple wireless mics that use AA batteries. I'm planning to purchase a couple more of these to leave behind with each sound system. They can drop batteries for 4 mics into the charger at the end of the event, and just leave them there (because of the charger's shut off) until they are needed some number of days later. On the other hand, for full day events, this charger will easily charge a 2nd set of batteries before the wireless mics drain the set they are using, so continuous operation should be very easy.

I'm over the radio system at work and I get many brand "M" battery packs returned to me for replacement, since they are 'bad' according to brand "M"'s "IMPRESS"ive charger no longer accepting them. Ive received hundreds of these 'bad packs' over the years and, presently, have several large boxes of collected spent battery packs in my office for recycling.One day, for poops and giggles, I busted one open to see what was in them. Some circuitry and two 18650 batteries. That's it. So I started busting out the 18650's to see if I could repurpose them for something else. I started buying the DIY four-slot 18650 battery usb packs on here, put the batteries in them and they charged right up without issue. I then pass them out as gifts or whatever. We never run out of portable power now. I also give them to guys with rechargable flashlights so they can have extra batteries and pretty much in anything else that uses these batteries.Since I have oodles of these 18650's, I wanted to have something a bit more professional to check their condition but also needed something with a lot of bays that can charge quite a few at a time. I bought this.I've been using this for a few days now and have run about 24 'bad' batteries through it. It will show the percentage of charge from start to finish, voltage of the battery, amperage being used to charge the battery, mAh of the battery and time to charge. The battery terminals are spring-loaded and very firm causing a nice seating and adjustable to fit whichever battery size you need to charge. You can go in and tailor the settings to your liking but, pretty much, it detects what is needed and does everything itself. I originally tried to change the settings but now I just trust the device and so far, it's performed well. This really is a fantastic charger.There are several settings you can tailor but this is pretty much a 'set-it-and-forget-it' device. I will probably order a 2nd device later.

This was able to detect all of the batteries I tried in it, even an NiCd which had discharged too far, several kinds of NiMH, LiIon, etc. The display is nice, compared to my prior version which only had blinking lights. This shows charge current, charge percent, battery capacity, etc. There are modes to override battery type, which is needed for LiFePO4 (which I do not have). You can also adjust the charge current, but it seems to pick the right charge rate automatically. Lastly, you can force a battery discharge/recharge cycle if needed.This replaced my older charger which could not detect some deeply discharged cells, and which eventually lost the right 4 slots, after 2 years. We will see if this new charger holds up, but after running 30 cells through it, I'm pretty happy right now.