kk2 voltage reading is wrong

I have a kk2 board flashed to the latest and the voltage reading is low from what the battery is actually reading. I've tried it with may batteries. Is there a way to calibrate the sensor on there? is it a bad connection or something? It is almost off by two volts.
 

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I have noticed the same thing with mine but my board isnt off that much just one volt. I too am curious as to the reason.
 

xuzme720

Dedicated foam bender
Mentor
I wonder if it's something in the firmware? What's everyone running and what is the voltage difference?
 
I checked mine again and it's actually about 0.1 volt high!

The KK2 V1.6 was fluctuating between 12.6 and 12.7 and the multimeter was 12.54.

KK2_voltage.jpg
 

Cyberdactyl

Misfit Multirotor Monkey
My KK2's vary by around +/- .2V.

I have seen a fully charged battery 12.6 on my charger read as high as 12.7 on the KK2, and as low as 12.4.