Extended battery on the M5P will trigger RID and will put your drone overweight so it needs to be registered in the US. However, you get the benefits of the longer flight time.
Here's one source for a genuine DJI M5P Plus battery for a reasonable price, delivered by FedEx quickly, and with no additional fees.
eBay seller is from Japan
Here's one source for a genuine DJI M5P Plus battery for a reasonable price, delivered by FedEx quickly, and with no additional fees.
eBay seller is from Japan
