18650 Battery Charger Combo 3.7V, VICTAGEN Universal Smart Chargers for Rechargeable Li-ion Batteries 26650 22650 21700 14500 10440 RCR123, Ni-MH Ni-CD AA AAA C

I unfortunately did not know the difference between flat top vs button top batteries therefore the batteries did not work on the intended application. They do however work in my flash light, and it is twice as bright! The charger works for both styles of batteries and is USB c and micro USB charger compatible which is awesome! Charges quickly and even brought a battery I thought was on its way out back to life. It functions perfectly fine after charging on this charger once.

I bought this to use on a 12V solar system. I installed an automotive USB port and this works perfectly to keep my 18650's, AA's and AAA's charged at 100%. Well made, easy to use, all boxes checked.

So I had been using the Two Battery Victagen with 18650 batteries for awhile. Both batteries lasted in my Nitecore and Streamlight flashlights. I got this 4 port charger for USB-C and for more 18650 batteries for other torches and as backup.However I also got it in hopes of it would charge my Nitecore 21700 which is slightly wider and about 5mm longer than 18650 or about 5 dimes stacked. It does state it supports 21700 batteries but not quite in my case. I tried forcing the Nitecore 21700 into the charger and it nicked the edge of the battery and wouldn't make contact at the positive button side. It needed another 2mm or so to clear the charge points comfortably. It may work with flat 21700s, but I'm not sure.Other than their overlook on taking 21700 batteries, it works well on charging 18650, AA, and AAA. Not sure if they actually charge AA and AAA all the way since I get varying Voltage cutoffs showing on the 2 battery charger version. I usually reinsert the "Full" AA or AAA a couple times till it reaches a FULL 1.45V or above 1.5V shown on the screen.I wished the 4 port version also displays the voltage of the battery inserted while charging. The bright display sucks at night as it is quite bright and stays lit as long as it is plugged in. The next version should include auto dimming of the screen or shutoff after the batteries are done charging. I do like the addition of the USB-C charge port since most of my cords are using USB-C, micro USB is outdated just as much as mini usb!

I bought a great headlamp at a thrift store and upon arrival back home discovered that it took special batteries. I bought these rechargeable batteries and charger to fill the need. The charger seemed to work well. Unfortunately, I don’t have a good feel for how long the batteries will last, as I’ve only used the headlamp for less than an hour thus far. I’ll update this review when I have a better idea how good they are, and how resistant they are to self discharge.

The display not only shows when the batteries are fully charged but also indicates the relative level of charge to be performed. Well made.

I have several flashlights that use this kind of battery (18650 3.7V). Somebody recommended I get this charger which also comes with 4 batteries, perfect for what I need. I also like the fact that I can charge different battery sizes. This is very convenient for me because I have several rechargeable batteries that I can use with the same charger. So far, so good.

I ordered these batteries at the end of February 2024. I have been used these batteries for 2 months but after the two month mark, they no longer hold power nor do they recharge. I would not recommend buying this product.

Awesome!!