The Yota Many battery indicator does not correctly indicate the percentage of charge. How to fix it?

Question

Yota

I have been using the Yota Many Wi-Fi router for over a year and have never encountered any problems. But after the device was completely discharged, as usual, I put it on charge and went about my business. A few hours later I found that the charge indicator shows charging, but at the same time, only one of the three "sticks" blinks. Although the charging went on for several hours and, as a rule, the indicator, during such a time, should have been completely filled.
I started testing the device and it turns out that the battery is fully charged, but the indicator only displays 9% (from the router settings panel in the browser). Yota support sent me to one of their centers, where they updated the firmware to the latest version, but no results. At the same time, the guarantee is one year and it has ended, so I would have changed it to a new one.
I searched all over the Internet, but I did not find anything on a similar topic. Maybe the Habr community faced similar problems?
Thanks in advance!

Answer 1

There was such crap, I suffered for a long time, but then I scored, because I rarely wore it without charging. As soon as he was cut off immediately to a portable battery.

Answer 2

This power controller flew, in fact Yota Many android without a screen, but such failures are only the fault of the power controller