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

Perfect fit this is an odd size battery so I'm pleased to be able to have replaced them. My old ones wore out

I found them all charged and great deal..

Works well. Flat top. Fits skyzone cobra x goggles

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.

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.

Do not buy these 18650 batteries. I use 3 18650 in series to make 12v battery packs for an item I sell. My customer only got a few uses out of my product before the battery pack gave out. I got the product back to diagnose it. Found one of the batteries went bad very quickly. The other two were fully charged at over 4v each! It ended up being a warranty on my part, and of course it happened after the return date so I can’t get another set of batteries or my money back. I’ve built more battery packs than I can count. They’re connected in series with a bms to protect them. I’d recommend steering away from Amazon entirely and getting your 18650 from a reputable website like bulk battery. You can get 8 for the price of 4 on here. Only downside is shipping isn’t as fast.

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!

Doesnt fit an Olight baton at all.