Do you own a DJI Mini 2? Then it is good to know that a problem has been detected with the (discharge) system of the batteries so that they do not automatically, partially discharge under certain circumstances to prevent swelling. DJI knows about the problem and is working on a solution in the form of a firmware update.
DJI works on solution for Mini 2 battery problem
Like many drones, the popular DJI Mini 2 uses lithium-ion polymer (LiPo) battery cells to store electrical energy. Thanks to the high energy density, these cells can power the drone for a long time during a flight, in the case of the DJI Mini 2 about 30 minutes.
However, LiPo batteries have one major drawback: if they are left in a fully charged state for an extended period of time, the cells can swell as a result of internal gas formation. This can cause the batteries to no longer fit in the drone. It can even create a fire risk situation as a result of spontaneous self-ignition.
To prevent the cells from swelling, DJI applies a sophisticated charging and discharging system in the batteries. Hence the designation “intelligent flight battery”. During charging, this system ensures that the cells are charged in a balanced manner, and if the battery has not been used for some time, that the cells are automatically partially discharged after a few days (“auto discharge”).
But now it appears that the batteries of the DJI Mini 2 have a problem that prevents them from automatically switching to automatic discharge as long as they are in the drone or in the charging hub. This means that the batteries remain fully charged if the drone is placed in the cabinet with full batteries and is not used for a longer period of time. With all possible adverse consequences.
Solution forthcoming for DJI Mini 2 battery problem
DJI says it is aware of the problem and is working on a fix, in the form of a firmware update for the intelligent flight batteries of the Mini 2. If you have a DJI Mini 2, always get the batteries from the drone or charging hub if you are not going to fly with it for the time being. Also, keep an eye on the DJI Fly app to see if a battery update is available (and install it immediately).
If you notice that one of your batteries no longer fits properly in the drone or is even visibly swollen, do not use this battery anymore and contact DJI.
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