Phantomhelp.com maintains an archive. I don't know how far back he goes, but try this link: DJI Phantom 3 Professional Accessories & Tips | Phantom Help
Scroll down to software.
There is an abundance of Litchi Mission Hub tutorials on YouTube. Plan some short missions where you never lose sight of the aircraft. Get a thorough understanding as to how it works and know how to cancel a mission mid-flight. One of my first missions returned as planned but then made a hair...
Litchi will provide an estimated flight time based on the waypoints. Obviously, never attempt a mission that would exceed the life of your battery, maybe 18 minutes. Where people tend to make mistakes is compensating for altitude that result in losing it in the trees or severe head winds upon...
I don't believe it's possible to disable Failsafe RTH. Failsafe RTH happens when your drone loses signal for 3 seconds. Low Battery RTH is triggered when the battery is depleted to the point that it may affect the return of the aircraft. Smart RTH is when you hit the RTH button.
Have you tried...
I always kept my P3S up to date for fear of voiding the warranty if I didn't. Runs fine and nothing to update to these days. My P3P has been asking me to update and I've left it alone. No issues.
You definitely want to take a look at the flight data, but it sounds like a loss of power. I recall reading about batteries coming loose on the P4.
Sounds like you purchased used?
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