Most of them are now manufactured in 2018-2019, so you understand that they have undergone chemical alteration simply due to the years they have not been used. They have a short lifespan and unpredictable behavior. However, we are talking about a device that is now a decade old, which very few people use.

The device for which I purchased the battery had a problem, with the new battery it worked for one day and then it turned off again, so I cannot give an opinion on its durability.

I read some comments mentioning issues with charging and battery life. I haven't noticed anything like that. It works just like the old one before it became unusable.

With the first charge, I noticed that the battery overheats excessively, to the point where the phone network is initially disabled and then the phone enters a high temperature state.

I was forced to put back my old one, luckily I didn't throw it away, and search for a new one for replacement.

FAR FAR FAR away

I was very pleased with the battery for an iPhone 6 that came into my hands with a bad battery and needed to be replaced. It is not for very continuous use, but this is due to the 1750 mAh and not to poor battery quality. I was satisfied.

Just received it and installed it. So far, everything is working smoothly, although the battery on top does not have the Apple logo .

Update: After a year, it needs replacement again, so I ordered it again

The new battery has almost the same performance as the old original battery, which seemed to only work at 80%. So I changed it and didn't notice a big difference...

Perfect.

Authentic Apple battery. Recognized immediately by the iPhone. Will come back in the future if any issue arises.