18650 Battery Case 4Pack Battery Set, 3400mAh Battery for Flashlights, Headlights, Fans, Digital Cameras, Toys, Radios, Speakers, Surveillance Equipment, etc.

I've never been dedicated lithium battery user. But when I started using a battery operated mod for vamping. I had to find some decent batteries. These past the test and have not let me down.On one charge they will last up to a day and a half. That's with heavy use. Hardly using the device it will last up to 2 to 3 days. So yes these batteries function Great.Charging them takes about 3 hours on a speed charger for lithium batteries. I think it could be better. I need to research chargers. However these batteries I strongly recommend, they are cheaper than other brands and perform the same if not better. Thank you for your time.

Great product. Exactly as described. Will buy again!

I received 4 of them in one package. It was packed very well and came in a plastic case. I was drawn to the product for the price. I thought it was a great price, I was right. They are really good quality. They were the exact size I was looking for. I have charged them and they work great. The battery lasts a good amount of time after I charged it. Even as much as I smoke they last me 2 days or more on one charge. They are worth the price. They are better than id hoped. Thanks!

Been using these for a few months, works well in the device I bought it for. Depending on the intended use, dimensions could be an issue. The product description says it's 70mm long, it is not, it's actually 65mm. This can be important, the two most common lengths are 65mm or 68mm. I have a flashlight that is designed to use a 68mm version of the 18650, this battery won't work in that device. If length isn't critical, the battery performs well.

These are not 3400mAh, but they are 320mAh'ish.I use these to power my dual 18650 vape box mod. When they get low enough the mod box will stop me from over draining them.Afterwards they go on my EBL digital read out 4 bay charger.the first few times they charged to just over 3000mAh.After having used them every day they now (from the box mod preset cut off point) charge to 3200mAh and the most has been 3265mAh.These work just as well as my old LG HE2(??) Samsung 3000mAh and all the best batteries for high drain devices like vape mods. I get a full days' worth of vaping out of them, and I vape all day every day and these are just as good as any brand I've ever purchased.They fudge the weight too. I have a .001-gram jewelers scale that I use to mix my own juice and they weigh 45.375,The other e2 are in use but that gives you an idea of the weight. Which is on par with the much more expensive batteries that I was unable to find at a price I was willing to pay.For the price of 2 LG HE2's that are 3000mAh or so new you can get 4 of these in a better than average carry case.I'll post pics next time I charge them from empty and I'll even pop them in a flashlight for a few minutes, so they get as close to dead (for good dead) as possible prior to charging and post pics of the read out.I've purchased 2 more sets of 4 so I could have all new batteries for all my devices.I'm not sure when I bought the 1st 4 pack but today is 2-1-25 and they show no signs of getting weak.

Short life on batteries

I mistakenly bought these batteries without noticing that they are 70mm long. I need flat batteries that are 65mm in length. So I returned them. They seem to work well, though.

They arrived in great shape, well packaged and good looking.However, upon first voltage check, one of them was 0.12V lower than the others. They really should be charged to the same level when leaving the factory so one of the cells has a higher internal resistance and discharges itself faster than the other three.When charging using it as a 4S pack, this did not improve much. When discharging, the cell that started with 0.1V lower voltage almost died at 2.45V while the other cells still showed 3.2V. Likely, this cell was bad to begin with as it seems to have a different capacity than the others. So these don't come Ohm-Matched.I'm charging the batteries individually now to check actual capacity per cell. Will update. But likely these cells are going back as they are actually NOT cheap at all but still no name ware.UPDATE:=======I used my usual charger to balance these out manually and discharge / charge them again and I only get 2700mAh consistently. These batteries are mislabeled and don't come close to the advertised specification as can be seen in the attached photos.