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Published 20 hours ago • verified publisher icon ttrftech

Incorrect battery readings

Open SMinin opened this issue 4 years ago • 3 comments

I have a miniature battery from the phone with a nominal voltage of 3.6V. I fully charge the device and after I turn it on the charge indicator shows about 70%. After half an hour the indicator turns red and then works for another two and a half hours. How can I calibrate the battery indicator? Firmware 0.7.1.

SMinin avatar Mar 23 '20 12:03 SMinin

Connect to PC, and correct v_bat measure setting (depend from used diode) Run putty or another terminal program Reset: 'vbat_offset 0' Measure: 'v_bat' Commpare vs Real multimeter measurenent. Set correction in mV run: 'vbat_offset 150'

For NanoVNA-H model you can use 150

DiSlord avatar Mar 23 '20 16:03 DiSlord

Thanks, it all worked. vbat_offset set to 500.

SMinin avatar Mar 23 '20 17:03 SMinin

I set vbat_offset to 0 and measured with command vbat. It said 3mV. The measurement with my multimeter said 4090mV. Is there something broken?

Fireobirdy avatar May 02 '20 22:05 Fireobirdy