Parrot Anafi battery fatal flaw when the cells expand.

[J@nne]

Ok, so I have heard that the Anafis fall out of the sky with no warning whatsoever and it has made them somewhat a bad reputation, I think I know why that happens.
I had a flying session and after that I charged the battery, the battery was still quite warm from the flight, after a while I saw the battery acting weird, it blinked the red and green leds in random order, this was because the Li-po Cells had swolled enough for the micro switch of the on-off buttom to be pressed and remained so as long as the battery cooled down because of he inner pressure of the gasses swelling up the battery, I also found out that indeed the battery does heat up during flight so much in certain circumstances that there is a 90% chance that the on-off button shuts the drone down in mid flight, the gap between the plastic button and the microswitch inside the battery is way too small and I filed the point of the button down a little to make some more space between the button and the microswitch and that had a significant difference since the battery does not behave like that anymore, I made the same "tune" for both of my original ANAFI batteries, the Chinese battery with the round button does not have this same issue, only the original batteries do, so if you want to be on the safe side I recommend all the Anafi pilots using the original batteries to do the same thing, the battery is pretty easy to pry open, it is not glued or anything and the whole procedure takes like 10 minutes, I assume this is the main reason why these Parrots keep dropping from the sky and no one, not even Parrot finds anything wrong with the electronics, thats because the drone shuts itself down from the on-off switch in mid flight.

 

[ParrotAnafiFan]

One time time towards the end of the battery the anafi auto landed with no warning message received as it usually does. I was never able to charge that battery again just get a blinking light. I hope it wasn't a security hole where someone can witlessly mess with telemetry or voltage or something. I opened it and recharged it with external charger and it recharged fine dunno what happened

 

[Liger 1956]

Ok, so I have heard that the Anafis fall out of the sky with no warning whatsoever and it has made them somewhat a bad reputation, I think I know why that happens.
I had a flying session and after that I charged the battery, the battery was still quite warm from the flight, after a while I saw the battery acting weird, it blinked the red and green leds in random order, this was because the Li-po Cells had swolled enough for the micro switch of the on-off buttom to be pressed and remained so as long as the battery cooled down because of he inner pressure of the gasses swelling up the battery, I also found out that indeed the battery does heat up during flight so much in certain circumstances that there is a 90% chance that the on-off button shuts the drone down in mid flight, the gap between the plastic button and the microswitch inside the battery is way too small and I filed the point of the button down a little to make some more space between the button and the microswitch and that had a significant difference since the battery does not behave like that anymore, I made the same "tune" for both of my original ANAFI batteries, the Chinese battery with the round button does not have this same issue, only the original batteries do, so if you want to be on the safe side I recommend all the Anafi pilots using the original batteries to do the same thing, the battery is pretty easy to pry open, it is not glued or anything and the whole procedure takes like 10 minutes, I assume this is the main reason why these Parrots keep dropping from the sky and no one, not even Parrot finds anything wrong with the electronics, thats because the drone shuts itself down from the on-off switch in mid flight.

Is it easy to open the battery to do this mod?

 

[J@nne]

Is it easy to open the battery to do this mod?

Yes it is, the battery is held together with few clips and can be easily taken apart with a small flat head screwdriver, just insert the tip between the top part and the lower part and pry, some of the clips will propably not survive but after you put it back together you can use a few drops of cyanoacrylate clue or any superglue you have, just be careful not to go too deep inside the battery so you wont damage the LiPo cells inside, the plastic tab of the on-off button is clearly visible once you get it open and it is not necessary to remove the switchboard itself, just use a sharp box cutter or razorblade to shave off some of the material from the button touching the switch, you can see how close the plastic is to the microswitch and what I am talking about, you can barely insert a piece of regular copy paper between the plastic and the switch.

 

[jaja6009]

OP, that is a very interesting find. I had a fall from sky event and this could very well be the cause. Back then I did not care for my batteries like I do now, since I did not know proper battery care.

Thanks for sharing.