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Android battery level
298 6 2018-1-21
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munchausen
Second Officer
Flight distance : 298583 ft
Norway
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Yesterday I realized something weird, maybe it's been always like this and I don't know if it has to do with my setup. I fly with Nexus5X (android 8.1), DJI GO 4.1.15 with OTG fw.900. All seems good, but after flying - everyhing disconnected, quit from app - the phone's battery is considerably down. I thought maybe the app is not very battery friendly, however when I put the phone on charger I jumps from 51% to 70% in seconds. This made me thinking, it's like the phone's battery indicator shows the RC's battery level which would have been roughly correct.
Is this already known? Do you experience similar? Is this due to OTG and/or Android?
2018-1-21
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DJI Elektra
Administrator
China
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Sir, please try to use without OTG cable. If the problem remains, please export the flight data and the black box for analysis.
2018-1-22
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munchausen
Second Officer
Flight distance : 298583 ft
Norway
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DJI Elektra Posted at 2018-1-22 00:21
Sir, please try to use without OTG cable. If the problem remains, please export the flight data and the black box for analysis.
https://www.youtube.com/watch?v=ngEHdAlAh9A

Thanks Elektra, what I described is not a problem, it is a phenomenon I noticed.
I am simply curious about the behaviour, since it would be important to know on a long hike if I can trust the phone to have more juice than it actually says it has.
2018-1-22
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Nidge
First Officer

United Kingdom
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Are you flying in the cold??

The batteries in smart devices don’t function well in the cold. This is compounded by the fact that smart devices are designed to efficiently radiate unwanted heat build  up as they are two small to install a cooling fan as you would have in a laptop or desktop PC. I have the same problem with my iPad Air in that at this time of year while outside in temperatures close to freezing it will start to report a low battery, but once back in the warmth the battery will show a near full charge again.
2018-1-22
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rimza
Captain
Flight distance : 3307 ft
Brunei
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Hi munchausen, try to calibrate the battery on the Nexus5X.  Not sure if it is android or device related but it sometimes helps by calibration to get the true android battery level.

You can also use apps like ACCUBATTERY to verify if any apps are guzzling  battery power.
2018-1-22
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munchausen
Second Officer
Flight distance : 298583 ft
Norway
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Nidge Posted at 2018-1-22 01:37
Are you flying in the cold??

The batteries in smart devices don’t function well in the cold. This is compounded by the fact that smart devices are designed to efficiently radiate unwanted heat build  up as they are two small to install a cooling fan as you would have in a laptop or desktop PC. I have the same problem with my iPad Air in that at this time of year while outside in temperatures close to freezing it will start to report a low battery, but once back in the warmth the battery will show a near full charge again.

Indeed, I was flying in -5-10C below, good to know, thank you.
2018-1-22
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munchausen
Second Officer
Flight distance : 298583 ft
Norway
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rimza Posted at 2018-1-22 01:44
Hi munchausen, try to calibrate the battery on the Nexus5X.  Not sure if it is android or device related but it sometimes helps by calibration to get the true android battery level.

You can also use apps like ACCUBATTERY to verify if any apps are guzzling  battery power.

I'll give it a try, thanks.
2018-1-22
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