Last Tuesday, using the HealthyDrones.com analysis, I noticed I had a problem with cell 1 on a second P3 battery. The battery had about 30 cycles. I emailed Support US @ DJI. Com with the details. By that evening they had issued an RMA with a FedEx prepaid label. I shipped the battery Wednesday, Monday I received an email that the battery was received and they would contact me with results. 5 minutes ago I received an email that a replacement battery had been shipped to my address. Can't really complain about that kind of service. The last time it took them 2 weeks to replace my first bad battery. I wasn't upset about that at all. This is better. Nice to have good news for a change.