So far, it works well. The only issue I consider relevant is that it discharges relatively quickly.

I bought it for my father who had a Samsung Galaxy S4. The battery made proper contact and made the phone work normally for a few hours until it completely discharged. Afterwards, he couldn't charge it again because the phone had burned out the motherboard and it wouldn't charge, but it definitely wasn't the fault of this specific battery. However, the only thing for sure is that it is suitable for the Galaxy S4

I bought it in May 2018 as a second battery because the first one, the original, started "giving up". The one I bought and received as the second one was labeled Made in China, while the first one, the original, was Made in Japan and was not worth the purchase

I bought a new battery for my mobile phone and now it works great! While before, it would shut down as soon as I opened the data.

The battery has nothing to do with the Samsung blister. The performance is less than half of the blister's. In my opinion, it's not worth even 6€ (even though I paid 15 because I wanted immediate delivery). Give 30 and get the blister from a reputable store, otherwise change your phone...

After 2 months, the mobile phone started shutting down on its own and I noticed that the battery had swollen.

The serial starts with BD, which is the one that the problematic ones have. If you can, avoid it.

In a very short period of time, it stopped having the expected lifespan, dying at 40-50%.

Prefer an authentic battery, this one is not authentic in "bulk" packaging.

After it burned my charger, the battery lasted only 4 months, maybe even less, with regular use of the mobile phone. (plus it was burning)

I bought the battery a week ago. When I put it in my phone, it didn't make good contact and the phone wouldn't turn on. After many attempts, I managed to fit it properly and turn on the phone. During charging, within 15 minutes it goes from 10% to 70%, and just before reaching 90%, it drops back to 5-10% sometimes due to poor contact.
Even if I disconnect the charger, once it reaches around 70%, when I turn on the phone again, the battery level is significantly lower. I gave it 1 star because I don't know if I can give it 0. The worst purchase I have made.

I bought the battery at the beginning of June and right now it's garbage. It only lasts a maximum of 8 hours and as soon as it reaches 30%, it drops to 5% in half an hour without any use. It was always fully charged and not at 30-40%, and in the end...!! Even the genuine battery lasts longer despite being used for two and a half years.

P.S. Also, they sold me the battery as genuine. Thank you

I bought it for 10 euros in May '15. Here, for about 7 months, I've been trying to keep it alive. The phone freezes after a few minutes. The same goes for the 2 chargers I have. As for the battery life at the moment I'm writing, from 100% it dropped to 36% in 7.5 hours of usage and very little use...

I resorted to the "Bulk" version as it was recommended to me as the same as the one I would buy from Samsung. I bought it in January '16 for €8.83 instead of the €19 that Samsung had it for. At first, everything was fine, it lasted about 20 hours with moderate use, but unfortunately in July '16, the battery started acting up. It only gave me about 6-7 hours of performance with a full charge. Since it was within the 6-month period, the store replaced it for me. Things are slightly better now, although the battery still lasts about 15 hours. Finally, I bought one from Samsung's service for €21.55 and now I understand what a new battery means. It lasts two days and charges much faster than the previous ones. Only two stars for the performance it had in the 6-month period.

I have had this phone almost since it came out. Its battery had swollen badly and didn't hold at all. I can say that for 7.88 euros, the battery is perfect! It lasts for 2 days without any problems at all. I recommend it.

I would give zero stars, but it doesn't have that option. On the second day, my phone kept shutting off and wouldn't turn back on! I put in my own battery and it started working again. I recommend using the genuine one, which costs around 25€