Geebax
Captain
Australia
Offline
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The Intelligent battery is called that because it has a processor in it to monitor the state of charge and also to control the charging process. There is nothing you can monitor in a battery to tell what state of charge it has, voltage tells you almost nothing, as LiPo batteries exhibit a fairly constant voltage right up until they are nearly depleted.
The processor in the battery therefore monitors the amount of charge delivered to the battery and also the amount of current used during flight in order to calculate the available capacity. It is important to realise the available charge is a calculated value, not a measured value.
As already mentioned, if you leave a battery for some days, it will begin to automatically discharge to prevent the battery swelling due to gasification of the electrolylte. Therefore it is important to understand that your charging routine should be to charge the batteries just before flying, not after a flight (unless you plan to fly those batteries immediately). In simple terms, in you are flying the next day, charge the batteries that night. Then you can have the confidence that they are fully charged.
If you charge the batteries then leave them for a week or so, as r.powell says in post #6, the batteries will have begun to discharge, and past experience seems to indicate that the battery intelligence does not take this into account, and may tell you the batteries are still fully charged.
As to whether you should put a fresh battery in each time you take off, there are several opinions about this. The first point is that DJI recommend you always take off on a fully charged battery, so if you choose not to and have a crash, remember that DJI may use that knowledge to refuse a warranty claim. My opinion on this, and it is also the opinion of a large number of experienced flyers, is to always take off with a full battery. It costs you nothing to do this, provided you have enough batteries. I have 4 and I always try to land and change them at the 50% point when I am shooting. I also have a car charger to top them up again if I need to in the field.
There have been many cases reported in the past where someone has flown at one location, moved to a new location and flown using the same battery, resulting in a shutdown mid-air. Ask yourself if it is worth the risk.
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