18650 Battery Charger Set, 3.7V Rechargeable Flat-top Battery for Flashlights, Headlights, Fans, Digital Cameras, Toys, Radios, Speakers, Surveillance Equipment (4 Pack Batteries)

I bought this batter charger set so that I will always have power when using my uvBeast New V3 385-395nm Black Light UV Flashlight. I prefer rechargeable batteries since they last longer than regular batteries because they can be recharged many, many times. These batteries work great and are easy to charge up.

I bought these, because I needed some for my new Vape that I had ordered! These have been awesome so far! They have held a great charge, easy to just pop in the charger that I bought. I think this pk was a great value for the money spent! Can’t go wrong with these if you need the flat top AA batteries!

It was easy to use and charged two older batteries I had. One set of the new batteries charged but did not work in the light unit I placed them. (The old batteries did after a charge) Could be a connection issue and not the batteries.?

These batteries have been working amazingly in one of my RC controllers so far. So far I have had no problems. The charging is a little slow but charges faster from the controller rather than the charger

Nice kit, easy to use, and sufficiently versatile. Only better thing would have been if it had used USB-C instead of micro because the former allows for more choice and is upcoming as opposed to going obsolete.In discharging from full to a 3.3 volt cutoff the unit under test gave 1460 mAh of capacity which by comprison to a similar 3400 mAh Panasonic NCR18650B was about 58% of the capacity. The NCR18650B gives about 2500 mAh at a 1C current. This unit gave 1460. At a 1A discharge current the battery delivered 1710 mAh. At a much lower 0.2C rate I would extrapolate capacity to about 2000 mAh based on typical performance for this type of cell. That's pretty typical regardless of what battery makers claim in their advertising. And this should come as no surprise as battery chemistry and the limits of what are achievable are not easily deviated from except at great expense or tradeoff. So don't be fooled, nature and chemistry, not marketers determine battery capacity.Still it's a good deal for the package. Just keep your capacity expectations realistic. And know a real 3400 mAh battery will cost you around $10 a unit making the cost of this kit double the cost of $22.98.

Update: The charger doesn’t work either. I bought these for use in my GeekVape Aegis. Typically your new batteries will at least have some charge on them when you buy them, but these had none. Took forever to charge. Even when indicating a full charge, they performed like a dying battery. And when they do die, they die immediately. It will indicate, let's say, half charge, and then boom, there's nothing. I've never had a battery be this awful before.

This is the second time I have purchased this set and I love them. They charge quickly and hold a charge for hours so great performance. I use these in flashlights, lanterns and vapes. They are easy to charge and you can't beat the price. I have never had an issue with these batteries or the charger.

I was disappointed because I I really wanted to like This charger. The battery life on them do not last long. It is easy to plug in the batteries to it to charge and they take a little while to charge but they don’t keep the charge as I thought they would.