I suspect that it is old stock. The battery only charges to 90% and the phone runs empty within ~5 hours. From my experience with this phone a new battery should last about 4-5 days. The old battery which is about 4 years old performs better. The seller is no help and does not hold what he promises, he insists on a video of the problem. What am I going to film? What a waste of time.
I'm very satisfied