They say it's 3400 but the six I bought, over 2500, don't charge.... probably not genuine....

ATTENTION!!! It is NOT Panasonic, it is fake. I don't know about its reliability, but it is definitely not even 3400mAh, it is 2300-2600 at best

Chinese flashlight that used to last 3 hours of work now lasts 4 days

I charge it preventively, I haven't run out of battery yet

In the description it says it is 3400mAh and on the battery itself, it says 3200mAh! Also, it does not say anywhere on the battery that it is Panasonic.

I bought 3 batteries for a rechargeable drill and where it worked after the first charge suddenly stopped and doesn't charge again. Completely useless and it's not the first time I've bought these batteries. They are probably not genuine.

They never reached 3400 mAh. At first, they were close to 3000 and after some uses, down to 2700. Still good even at this level, but they should correct their nominal capacity so that people are not misled

I used it in a mini UPS for the router, but after a few months it gave out, the UPS shuts down immediately when the power goes out.

Actual capacity, I changed to a rechargeable external light instead of its own, and from 2 hours it lasts 11

Three stars because they do their job for a certain period of time. They are imitations and of course have lower performance than what they claim.

However, they work. If you buy them knowing the above. Okay, they work.

Simply on the 3rd charge the battery broke and doesn't charge again at all. I changed chargers and I changed cables... it just broke.

Not what you expect. I didn't take measurements, but from the previous one that had the same, this one holds at about 3/4.

Use in both electronic cigarettes and wireless cameras. Reliable and strong, with great durability over time.

Satisfactory performance, now their casing which usually peels off will show in these how long it will last, however it seems to be durable.

I bought two eight months ago and I use them alternately for an electronic cigarette. Well! They have lasted a long time! The charging they need now is more frequent. Their usage is not so heavy to justify their frequent charging.

I bought a pair of these and one of them is completely dead. At first, it got very hot during charging and then when I put it in the mod, it showed 0%. I tried combining it with other ones that work, and I even changed its polarity, but it's still dead

In many cases ( for example, flashlights, headlights and many other devices) , you need to use button top 18650 li-ions/NCR / Panasonic batteries for proper contact- these flat tops won’t reach to make contact enough. So be sure what to get before ordering. Don’t have with the quality of the batteries. It’s purely a design issue. Will reach out or won’t. The photos are self explanatory.

Guys, I'm reading the comments and everything is fine...
But I have the following question. After the first charge and then using the xtar vc4 charger, why do they show me that they are charged at around 2500 mah? Did I get a faulty batch or something else? I bought three.
And all three are at a maximum of 2700, NOT 3440 mah.
New update: I completely discharged them with a flashlight because they don't fully discharge in the e-cigarette, and they actually seem to go down to around 3300 something

It is good for an electronic cigarette, but for longer use and higher ohms, more mAh are needed than 3400

They were put into a rechargeable Parkside drill driver. Another tool!
Power and much greater autonomy.

Very good in my experience. I have been using it with strong lens for quite some time now, and it has not disappointed me, quite durable.

The most awful batteries I have ever purchased, I have tried various ones. In five months, the charging barely reaches 1800 mah. I only used them for an e-cigarette. Stay away!!

It's top-notch. Worth every penny. I bought 10 pieces and put them in a battery pack. Why was this model discontinued? They are very good in both power and durability. 10/10

I bought it for an electric screwdriver. It works great for a while now. I haven't seen anything negative, everything is good!

Much better than the EFEST 3500mAh, as they do not lose any of their performance unlike the EFEST.

I bought 4 pieces, 2 of them were defective!
Furthermore, I would not recommend them for use with an electronic cigarette as they discharge very quickly, it's better to go for something more expensive.
Plus, the company's name is not written on the batteries!

I never saw the capacity to be honest, somewhere around 2000mAh is what the charger I'm using shows (I don't know if the measurements are correct - I have the XTAR X4).
After 1 month of use (I have 4), the plastic casing has torn on 2 out of the 4.
I don't think I would buy it again.

Update:
3 out of the 4 I bought started leaking liquid from the top...

They're going in the trash. Never again.

Good batteries. I have been using them for many years in a flashlight. The old ones I have, which are 8-10 years old, are now at 2600mAh for real. Not intensive use. The 4 new ones I bought now are really 3121mAh, 3121mAh, 3136mAh, 3153mAh. Around 45 mΩ. Measured with Vapcell S4 plus in Capacity Test. I am quite satisfied.

It lasts for 3 years, still the same as the first day... same lifespan, same power as the first day, I wouldn't change them with either LG or Efest, much superior

I use them in an LED flashlight. After days of the switch being left on, I tested the battery and it had dropped to 1 volt. With the xtar vc4 charger, as soon as I put it in, it recognizes it as a 1.55v battery and charges it up to that level. I take it out, put it back in, and it charges it to 3477mAh at 4.2v! The 3400 is the maximum capacity from completely empty, those who charge it when it drops to 3-3.5v will never see a charge of 3400mAh.

One of the best on the market in terms of duration and consistent performance at least in the e-cigarette that I have used