Mine dove into the water while using my iPhone XS Max. After a few weeks I was able to recover it. I was able to retrieve the JSON file for the flight which shows about a 46 (or 48) percent battery charge at the time of the crash. The drone was stationary at the time and I was taking still photos when I noticed the response to the shutter button getting laggy and then the screen went to static. I looked over to see the drone crash into the water power off. To me it seemed like the program on the Parrot crashed resulting in system shutdown on the Parrot and the fall. Here is what I wrote to Parrot in their enquiry - I did not receive a replacement drone - out of warranty.
I just realized an irony with significant dates in my Parrot's history. I acquired it on 9/11/18 and it crashed on April 1, 2020 (not an April Fools joke).
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Additional details you may find useful: I haven’t marked my batteries and am unsure if the battery on the drone was the battery just purchased in March 2020 or one of the original two batteries that came with the drone in September 2018. The flight controller app shows 38 total flights which I think is accurate. Some of those flights were just power on having no more than seconds power on time so there is very light battery use. The longest flights was approximately 14 minutes. For this flight, Before the flight, I charged the batteries to full charges. My two original batteries were not used since December 2019 and I did notice that they were fully discharged as it took several minutes being connected to the charger before the first battery level indicator light turned on. I haven’t marked my batteries so I don’t know if the battery on the drone at the time of the crash was one of the original batteries or if was the new battery.
My interest was the shoreline near the crash site. On liftoff, I turned on the video recording and went to video the shoreline. I took videos from several angles and zoom settings. After several passes, I returned the drone to home but instead of landing, I decided I should take some photos of the area and possibly stitch them together for a detailed view. . So I changed the camera mode to burst photo and returned to the area of interest. I would take a burst of photos during which the screen would ‘freeze’, wait for the screen to resume the live view, pan, take additional photos, pan, photo, pan, photo then the screen locked up for longer than usual. For some reason I sensed something was wrong, The screen was locked up longer than usual. I looked over to the drone and saw it falling at a high rate of speed into the water where the crash site is marked. I don’t recall hearing any sound and the drone was falling straight down with one end (looked like the front??) angled downward. The impact speed was so fast that it made the ‘fast impact’ noise you get when you throw a small stone high into the air before it hits the water - a thump rather than a splash. I went home, took some screenshots, initiated this incident report, and started working on getting equipment together for a search which I started today (4-5-2020). Unfortunately I can’t swim the area as the lake ice just thawed a couple weeks ago so the water is near freezing. It appeared to me that the drone just stopped mid air with no warning and fell straight down since I was only yawing and photographing so there was no forward, sideways, or vertical momentum.