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Measuring Flight Battery Capacity
371 7 2020-1-16
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Minnesota
Second Officer
United States
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New battery and freshly charged shows a lot of "above spec" capacity.  I'm sure over time this MAX fades with use, but this does show a way to test them and keep track of their capabilities.  I tested at 10 watts (5V/2 amps), but in use I believe they operate around 4x that (40 watts).


2020-1-16
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ljmario
Second Officer
Flight distance : 121667 ft
Germany
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love your vids! like the info in them!
2020-1-16
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DowntownRDB
Captain
Flight distance : 525 ft
United States
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Another very informative video.  Thanks for Sharing Tommy.
2020-1-16
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Dirty Bird
Captain
Flight distance : 7383379 ft
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United States
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Good test.  We're going to have to grant you a catchy title like "rofessor" or "Mr. Electron".  

2020-1-16
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Minnesota
Second Officer
United States
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Thanks all.  

It's important to note that mAh measured this way is at a fixed voltage of 5V and will result in a value that can be compared in the same way in the future to judge this battery's health.  The mAh measured shouldn't be compared to the 2400 mAh rating of the battery since that rating was obtain while the voltage was declining from a fully charged state of ~8V to a cut-off level of ~6V.  

The Watt-hour value obtained in this test can be compared with the DJI rated Wh of 17.28 since Wh takes into account voltage.
2020-1-17
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DAFlys
Captain
Flight distance : 1202936 ft
United Kingdom
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Nice test,  thanks for sharing.
2020-1-17
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virtual
First Officer
Flight distance : 2595246 ft
Czechia
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Nice test, good to know that there are reliable cells (did I read somewhere that Samsung?). The higher measured capacity could be made by lower load (2A). I don't know the power consumption of MM (in S mode or high wind I guess more than 2A), under 5A can be possible that battery hits 6,xxVolts cut-off earlier. Anyway great result!
2020-1-17
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Montfrooij
Captain
Flight distance : 1934931 ft
Netherlands
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Interesting video!
2020-1-17
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