Help! Charger showing weird battery percentage

[Superman]

Hello, I have imax B6AC charger. Today, after flying the lipo down to 3,5 v I put it to charge. When I looked at the screen it said that the lipo only had 8% juice left, but the voltage was about 3.6 v.

Is it just some bug or something to worry about?

Thank you in advance!

 

[Ketchup]

Hello, I have imax B6AC charger. Today, after flying the lipo down to 3,5 v I put it to charge. When I looked at the screen it said that the lipo only had 8% juice left, but the voltage was about 3.6 v.

Is it just some bug or something to worry about?

Thank you in advance!

That’s not abnormal at all.
It is important to remember that battery voltage and capacity are not proportional, so when the battery is at “zero” the voltage would still seem quite high, like 3.5 or 3.6 volts.
If a lipo passes below 3 volts it will be damaged, and I personally wouldn’t even trust a lipo that drops below 3.2.
I use a timer when flying, but I try to set it to go off when the battery is around 3.75-3.8 volts so that I have a little buffer just in case.
I would read through this article for some more lipo knowledge:
https://oscarliang.com/lipo-battery-guide/
The article is directed towards multirotor pilots but most of the information will apply to us fixed wing pilots as well.