16340 Rechargeable Battery 3.7V 2800mAh Large Capacity Button Top Batteries for Headlamp Flashlight(4 Pack,16340 Battery+Charger)

Really nice. You can charge different size batteries

I received the product today. The batteries charged up fine and are working as expected. However...I thought from the picture that the charger used a USB-C cable, but it is USB-Micro.Also, the charger is a very cheaply made unit. I have to wonder how long it will last before I will have to find a replacement.

All rechargeable batteries lose capacity over time. Often it can take a year or more to tell just how good or bad a battery is actually. Cheap or inferior batteries tend to fail right away. So far these batteries seem to be functioning well in that they are holding a charge and last a decent amount of time while being used.

Works as expected. No issues in my headlamps. Included charger is a nice bonus. Capacity is way overstated, more like 700mAh.

I've got an old Nebo flashlight that has this odd sized battery. The old battery finally died, but it would at least work on it's charger. These batteries won't work on or off it's charger. All the numbers match. These are just a higher amp hour. I used the battery charger these came with to charge them first. Couldn't get any of them to work. Unfortunately these feel like a waste of money.

Replaced the 700mAh battery in my Memo torch and it’s even better! Tested off a full charge full brightness-5hrs!

Works as intended

Charges well but battery pops out very easily