Great caution, these are not authentic Sony products; they put a sticker on top to cover it. In my order, I received 2 with a silver sticker, and I peeled it off to see if they were authentic, and instead of Sony, they said Murata. I requested a replacement, and they sent me the same ones with a different sticker, and again under the sticker, it said Murata. The seller told me that Murata has bought the production rights, but Skroutz advertises them as Sony. I tried to scan the QR code, and it showed 1234567890, and the barcode indicated that it doesn't exist at all.
As for the capacity, I'm not sure if it's 2600mAh because I don't have the means to measure them, but during charging, one fills up faster, and during discharging, it empties faster. Quite frankly, they are unacceptable because I want them for my electronic cigarette, and I'm afraid it might explode in my mouth.
P.S. Ultimately, they are not 2600; they are 2000mAh

Purchased from a well-known battery store for 3 years now. Daily use in a drone that draws up to 20A. Discharge constantly up to 2.7v. After many charges, I don't see a significant difference. It came in a bag, not a box, and did not have any sticker on it.

I don't know if I bought an authentic product! This is the problem with such purchases as there are many imitations!

I had ordered the first time two batteries, these specific ones, from a store. They arrived to me with the sticker crookedly stuck on, both of them, and even though I measured them at the time, I don't remember to tell you the capacity.. the batteries die immediately though.. after a while, I ordered three more from another store, they arrived with a sticker that seems to be correctly placed at least, and they have nothing to do with the first batteries I had bought from the other store. The first ones I bought had a silver sticker with black letters, while the next ones had a white one.

I bought 5 from a well-known store. They arrived in their box without any signs of tampering, etc.
3 of them are 800mAh and 2 are 1800mAh. The worst battery I have ever purchased.

The capacity of the 5 batteries is max 1800mAh. I was very disappointed with the purchase. Of course, I will never buy it again.

I use it in an electronic cigarette, eleaf invoke. They charge up to 50% and then display a charge error. I tried them on both of my devices with the same result. The Efest IMR 3,000 mAh batteries do not have the same problem on either of the devices. I should also mention that mine are TC6, not 5.

I have the VTC5 but the VTC5A is the same as the VTC5 with the only difference being that it can deliver up to 25 amps continuously while the VTC5 can deliver up to 20 amps. Both the VTC5 and VTC5A are among the best batteries and also affordable. Don't think about it at all, if you are looking for electronic batteries, then the VTC5A is what you should get! I have been using the VTC5 for 1 year in a vaporizer that produces clouds and requires good current, and it still runs like the first day. Just know that in 1 or 2 years you will need to rewrap it with a battery wrap because, as is logical, all battery wraps need to be replaced when they wear out in order to prevent a short circuit and damage to your electronic device.