It worksSo far these are exactly as described! I needed new vape batteries and charger and these are perfect and fit in my vape great! So far so good!great quality /i have used two of theses batterys the past year and 4 sony batterys these batterys last twice the time .I love that I never have to wait for my vape to charge anymore. I should have done this from the beginning.So I need new batteries for my E-cig and this was a perfect match for the longevity and definitely the price! Don't spend more because it cost more thinking it will be better. This seller gives it to you at a decent price with quality!! Thank you to this seller for finally giving it to match what it's worth for the product!!! Go Cardinals!!!!Work wellWire feels a little flimsy but holding on so far and the wire could be longerVery solid construction with as-advertised capacity and physical dimensions. I've put the cells through about 10 charge cycles with no issues so far.