Where did you find?
I think with a short artificial load and measurement before starting to charge, the BMS determines the current charge of the battery and then starts charging. This may be a short flashing of the LEDs after the USB connection and only then will it indicate the level.I am having trouble getting my head around the charge in v charge out method of calculating the % battery left. I understand that the software can calculate the amount of charge put into the battery, provided that the USB-C connector is used and it is not charged via the battery connectors as some aftermarket chargers appear to do. But to calculate the actual charge in the battery it must know how full it was before charging started. Is that figure based on the resting voltage before charging or us their an internal table in the firmware that tracks each battery? I also assume that the Maximum Battery Capacity is also calculated from that figure.
Since all my batteries are above 97% in condition, I can’t try them, but I think they need to be solved similarly to mobile phones. For mobiles, the battery.stat file must be deleted and charged and discharged 2-3 times up to 100% -0%.I have a ponderance to add here and curious if anyone knows the answer. We have a handful of Anafis at work and fly several other systems as well. Two of the other systems we fly need to have the battery BMS calibrated periodically. Parrot from what I have seen say nothing about this and no one does it. The purpose on the others is that the BMS over time drifts what it believes 0% to be. We train our pilots to always land at 20% but over time the BMS drifts 0% towards 20%. By calibrating the battery it resets the BMS to accurately report the %. I can easily troubleshoot this with the other systems but Anafi doesn’t have any way that I have found. I ponder if this might be a portion of the issue with Anafi batteries these days.
I have already summarized it in the opening post. These are worth following.How to proper charge the Anafi batteries? I would like to have those multi USB chargers, charging at same time the 3 batteries. Do you have any recommendation? How to monitor the charge during the flight? Or at least on a computer?
Thank you for the praise!I just received my first parrot anafi (it's also my first drone) and I tried to inform myself about the best practices to maintain the battery. I found this super useful thread (thank you very much for that). Now I still have a question regarding the 'post-flight' situation. You said if it's under 20% you would recommend to charge it to about 65%. If I have at about 25-40% remaining battery would it also be better to charge it a bit (to 65% - I think it should be loading them until the fourth green light starts flashing) or just keep them as they are. And I guess it's also always better to just charge them shortly before the flight to not have them at 100% too long.
I don't know in which thread but there was a discussion about that somewhere in this forum.within 20 minutes? Parrot says you should NOT charge for AT LEASt 20 minutes
People on this forum actually believe that old firmwares cannot crash... think about that for a few seconds. Would you trust those kind of “experts” to educate you on battery maintenance ??I don't know in which thread but there was a discussion about that somewhere in this forum.
The result was that by using a powerbank (low current) you aren't creating much heat and so the battery can still cool down after the flight. Those 20 minutes are the time gap in which the battery should cool down as heat isn't that good. The most important point is that probably staying below 20% damages the battery more than the little bit of heat the powerbank generates.
Most of those points are just about the functionality of LiPos. For example a voltage below 3.5 is already starting processes which damage the battery. This can be verified through other source too. And it's obvious that Parrot has a problem with it's software showing the remaining capacity on the battery. If those tips actually help me to avoid a crash, why not using them? As already said, literally every claim can be verified through third party sources.People on this forum actually believe that old firmwares cannot crash... think about that for a few seconds. Would you trust those kind of “experts” to educate you on battery maintenance ??
As it is not advisable to charge it when it is hot, you should wait until it cools down and then not leave it on low voltage for a long time.within 20 minutes? Parrot says you should NOT charge for AT LEASt 20 minutes