4 Pack 18650 Rechargeable Battery Lithium with Charger 3.7V 3300mAh Flat Top, Batteries for Headlamps, Flashlight, Camera, Small Fan, Outdoor Garden Lights

These are Battery size 18650's and have reasonable charging speed, I haven't tested them for their MAH but the seem to be pretty decent for the value for the money. I do recommend getting a better charger, one that can give you Volts Milliamps, And other information about the battery as it's charging. The charger that comes with this set is very basic.The Functionality and ease of use are very simple. If you can charge a battery you can use these. You do have to be aware that these are specific batteries for specific types of Flashlights , Cameras, and Other high power high drain devices. These batteries should charge up to about 4.2v with an operating voltage of 3.7v I use them for high power Flashlights and Lasers. So using rechargeables are the only way to go. As of right now they are performing well and lasts a decent amount of time before needing to recharge. I also noticed that when using more than one in a device they do drain evenly which is a good sign of a quality battery

Great quality, works great, fast charging, batteries hold charge very well.

All functions as intended. Only negative is the design of the charger. Difficult to remove batteries(s) without the charging arms slamming forward. Time will tell if they stay connected.

They work great. I got them for my vape mod. Charge fast and charger holds good. Their new so we shall see over time how they last. Definitely worth the price. Less expensive than at the vape shop.

These batteries are perfect and seemingly high quality. You get 4 + a charger that works really well, and has 4 indicator lights so you know when your batteries are charged at. It comes with a USB C cable for fast charging, and no charge block which is okay by me since it cuts down on waste (who doesn't already have 30 charging blocks???). I tried multiple charging blocks and they all worked just fine.I have tested these with a flashlight and a vape and they both worked perfectly. I was able to vape pretty much all day on one set of batteries, where as my old ones only lasted a few hours. Overall I am very satisfied with my purchase, and I would definitely buy these again. If you are on the fence go ahead and take the jump! You won't regret it!As an added bonus you can also charge 18490, 18350, 17670, 17500, 16340 and 14500 style batteries as well with the charger it is very versatile!

Love it so far, have had this for about 2mths and it charges the batteries great! For me the batteries last all day and they are being used all day. Only downside is fall was the C-port wire didn’t work. But gladly I have a lot of those.

Really good

Product is everything you expect for the cost and brand. It’s works great but after a year of use, you may need to replace the battery depending on the use. Luckily this set comes with 4 which was nice since I always needed two at a time.