Nokia N82 battery calibration?

Question

Nokia

Greetings!
For quite a long time, my faithful mobile companion was the Nokia N82. Once he suddenly sat down, and there was nowhere to recharge. I bought a battery for 300r and was satisfied.
After some time, he held the charge less and less. The original new battery was bought and I stopped using batteries for 300r, but nothing has changed. The phone both sat down for an hour of listening to music, and sat down.
I think that the problem is in determining the battery charge - some kind of calibration in the phone has probably gone wrong, because. I already tried to change the battery and nothing changed.
After searching the Internet, I found a way to calibrate the battery - but it is rather dubious.
Maybe someone knows the reason why, over time, almost all phones (with an iPhone, this effect is less pronounced) begin to “keep” the charge unnecessarily less and inadequately show the charge level? And replacing the battery doesn't help.
And how can this be related to the installation of non-standard batteries?

Answer 1

Make a hard reset, then discharge the bodies until it turns off, insert into charging (not including), when fully charged - without removing it from the outlet, you must turn it on and wait for the final charge.

Answer 2

Download Nokia Energy Profiler and see consumption :)
People often change batteries, despite the fact that the problem is in the phone. As a rule, due to the ingress of liquid (moisture), corrosion occurs, which is conductive. Hence the high consumption. Take the phone to a normal SC, let them diagnose, find out what the problem is.

Answer 3

Maybe someone knows the reason why, over time, almost all phones (with an iPhone, this effect is less pronounced) begin to “keep” the charge unnecessarily less and inadequately show the charge level? And replacing the battery doesn't help.

Li-Pol battery can withstand approximately 150-250 recharge cycles; Li-ion batteries 300-400.
Replacing the battery should resolve this issue.

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And how can this be related to the installation of non-standard batteries?

The use of various "left" (for example, reinforced) batteries may not do this, it is highly undesirable.
Your problem may be caused by the purchase of an unknown battery for 300 rubles.