Battery goes from empty symbol - to full.

[GoogleCodeExporter]

my first flight with arduplane, voltage & current sensor installed, and 
properly selected, only voltage - not current *calibrated* with fluke, but the 
curent sensor should not be very off, (selected attopilot 90A - which this is)

4,2Ah 3S pack, configured in Planner as 4Ah

I assume the battery symbol presents measured power consumption vs predefined 
capacity.

Anyway - took off, full battery, the battery symbol got reduced to empty during 
5-10 minutes, yet voltage at full throttle proved it to be good. - then I got 
the battery symbol with exclamation mark.   Few minutes after that, got the 
battery full symbol. 

I will calibrate the Attopilot 90A current sensor voltage per ampére once I 
find where Planner displays it's idea of current, but assuming it cannot be 
that much off something can be wrong.
It's a dangerous error if the OSD can go from critically empty to full battery 
symbol.

Original issue reported on code.google.com by andre.kj...@gmail.com on 11 Feb 2012 at 3:09

[GoogleCodeExporter]

ok, my battery capacity was wrong, default 1,7Ah value were saved , while I 
flew on a 4,2Ah pack . 
Anyway, it should not roll over back to full. - but it's possible that the 
error is in APM ?

Original comment by andre.kj...@gmail.com on 12 Feb 2012 at 9:05

[GoogleCodeExporter]

This is probably because the voltage drops when your model starts draining too 
much current. When you stop the full throttle it raises again above the limit. 
So the symbol returns to the previous state. It needs to be improved in the APM 
side, perhaps by adding an external hardware for battery monitoring.

Original comment by sbeni...@gmail.com on 1 Oct 2012 at 11:11

• Changed state: WontFix