New Battery - What procedures to be done?

[aKp1]

Hey guys! So I am having now turning 3 years old Xiaomi Mi3. It is still working pretty good with all these roms we've got credit to the great developers we have at XDA. The only problem I'm having is with the battery life. Previously it would last whole day. Now I'm charging it thrice daily.
So I ordered a new battery and replaced it.
The problem is at around 20 % of the battery, the phone died suddenly and when I put it in charging it flashed the notification light as if the battery is completely drained. Mind it that after replacement, I straight away charged the battery to 100% and then calibrated using battery calibration app by Nema.
After the phone died, I put it in offline charging and didn't reboot the phone until it was totally charged and then rebooted. It is now working fine!
The battery is holding better than what I was having but still, it goes down easily.
I am a heavy user! Lots of browsing, ebooks, emails, whatsapp, camera, etc.
Is anything else needed to be done.?
I am currently on second battery cycle of the new battery. Right now I got 2 hours 10 min SOT and 45% still left.
I am pretty sure, even this is not going to last the whole day as it used to do once back when the phone was new!

BTW am on NOS and it is pretty stable and generally always on 3g.
Please advise!

 

[Prashanth Meesara:]

If you got the battery from official service center only then expect it to work as it used to do when the phone was new. Batteries from eBay, amazon and other websites won't give backup as the original one does because they aren't original ones, typically such batteries have 60% backup when compared to original one.

 

[aKp1]

If you got the battery from official service center only then expect it to work as it used to do when the phone was new. Batteries from eBay, amazon and other websites won't give backup as the original one does because they aren't original ones, typically such batteries have 60% backup when compared to original one.

The thing is that the service center guy tells me that they have stopped importing parts of Xiaomi Mi3. I tried it in another center, they told me that it will cost 1500Rs for the battery and 600Rs for installation and service charges.
So I got it from ebay at 300Rs and replaced myself.
Probably you are right and this won't be giving any improvement to me! I just gave it a try so that I can wait for a month or so for newer phone launches. But I guess I have to rely more on charger than on battery

 

[ankit7877]

got a new battery for 300₹ from ebay..replaced it myself..3 yrs is more than enough from a single battery..battery backup ki great..m getting around 4.5-5hrs of SOT..probably which i was getting when i bought this phone..currently on DU. i am on wifi almost all the time.

 

[coolfire92]

got a new battery for 300₹ from ebay..replaced it myself..3 yrs is more than enough from a single battery..battery backup ki great..m getting around 4.5-5hrs of SOT..probably which i was getting when i bought this phone..currently on DU. i am on wifi almost all the time.

Can you post a link?Does the device shut off at 20% battery?
Also can you check the battery temperature while charging?The one I bought from ebay never goes above 25.