3.7 Volt 21700 Rechargeable Battery 5000mAh Battery 2 Pack Large Capacity Batteries for LED Flashlight, Headlamps, etc

Works great. No problems with it after a month of use either.

The media could not be loaded. I bought this as replacement for my dying Samsung INR 21700 50S. It was at the time of instation that I realized it was at least 0.5cm bigger in diameter. While this should not be an issue for most applications, in my application, that was too wide a margin of error.I can't speak of capacity, I could test it but decided not to stress this cells for now.I would recommend only buying this if such dimension is not going to be an issue.

Thanks

These are slightly oversized and may cause fitment issues in some devices. Additionally 3000mah seems more accurate than the advertised 5000mah.

Great product

The reason they’re “frequently returned” is because the seller is knowingly selling bad cells. They don’t hold a charge. I wouldn’t be surprised if they’re used and rewrapped to appear new.

I purchase several things on Amazon and was giving pretty in-depth reviews. From this point on, here's the new agenda…. if it works as advertised, is well made, meets or exceeds the description, is a value, and arrives in a fair amount of time, it will get a "star rating" equal to what my expectations were/are. If it doesn't meet these criteria, then I will most definitely and descriptively tell the short comings of the products and you as a consumer will not have to go through the trouble of buying the product without some background knowledge. If the sell pulls that item and relists under another description, I will put the exact same review on the seller's feedback page. Sellers have done this a couple of times in the past, and I was true to my word then as well as now. DR

If the device you are using 21700 batteries in has a very tight size tolderance then these might not fit. They are just a bit taller and fatter than other 21700 batteries I have used. These will not fit in 4 out 5 of my devices.So far they appear to be good in use but I have not seen any indication that they are longer lasting. The 5000mAh does not refer to the amount of charge. It refers more to how many times they can discharge and be recharged, just for you to know.