kyalami
Captain
Flight distance : 44914321 ft
Sweden
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NickelPlate Posted at 9-23 09:04
One thing I'll add is that Lipo cells are the most chemically stable at a voltage of about 3.8V per cell and that is the best way to store them. You can definitely prolong the life of them by keeping them in this state when not in use. I've had lipos in my other RC models that are 3 and even 4 years old and are still going strong at 80%+ of their original capacity with no swelling because when I'm done with them I put them in storage mode. I personally don't leave my MM2 batts fully charged for any longer than a couple of days. Usually after every flight when I get home I'll either charge or discharge them to about half their capacity which is pretty close to 3.8V. You can also connect the DJI batteries to the drone and turn it on and view the individual cell voltages in the app if you want to be really specific. Fly it a little if they are charged too much.
What would be nice is if DJI were able to add a storage feature to their chargers that would balance all of the cells to 3.8V. I know the batteries discharge themselves automatically but it takes too long (9 days?) IMO to rely on all of the time. Chargers for the RC hobby have had storage charge modes for years now.
Hi NickelPlate, Thanks for your reply and further information about storage voltage of the batteries. Also great to here that you have managed to keep the batteries so good over so many years. That makes me more comfortable with the battery life. After a flight I let them cool down over night and next morning I charged them up to about 60%. I will now check in the drone what the voltage is at that percentage. I only charge the batteries that day when I am about to fly, so they never sit more than a few hours at full charge. DJI has now made it so in the firmware that I can select 2 days before they start to discharge, so they never sit too long at full charge. This is for the intelligent fly batteries for Mavic 2 Pro and the Fly Go 4 app. But I never let that happen in any case. They are just too expensive not to look after to the very best. Particularly now when they start to get difficult to get hold of. Again appreciate you reply and further comments. Thanks very much. Tony |
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