No longer holds the load

Less than a year after its acquisition, I see that the battery is empty in less than 8 hours with 2 calls 10 minutes.
So I strongly recommend this product is 1 year warranty, but it is impossible to go back 30 days after purchase.

Adding to the previous comment:
Following the above comment, I was contacted by RAVPower so he could send me a new battery free of charge.
I said that the former was still under warranty.
After-sales service has been excellent for my case.
I received the new battery 5 days after.
I just installed it in the phone and will be able to test its ability to hold a charge.
In any case, no need to charge my phone 6/8 hours after initially loaded.
Accuracy: separate data and continuously activated Bluetooth, I do not use other functions.
To be continued ...