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Blog1 min read

Is there a battery calibration code? How to calibrate properly

On current phones there is no calibration code that “repairs” the battery. Some codes only show battery information. Calibration helps the percentage reading measure correctly again; it does not bring back a worn battery’s capacity.

Cep Market Repair TeamIn Kadıköy since 2006
Key points
  • A calibration code does not fix battery health; at most it opens an information screen.
  • Calibration helps when the percentage is wrong: shutting down at 30% or staying at 100% for long.
  • To calibrate, charge fully once, use the phone until it turns off, then charge it fully without interruption.
  • Frequent calibration wears the battery; do not do it more than once a month.
  • For swelling, sudden shutdowns or very low battery health, the fix is a battery replacement.

01What calibration can and cannot do

SituationDoes calibration help?
Percentage jumps aroundYes, usually
Stays at 100% for very longYes, usually
Low battery healthNo, the battery is worn
Swollen batteryNo, replace it now
Sudden shutdown at 20–30%Usually not; check the battery

02How to calibrate

  1. Charge fully. Charge to 100% and leave it plugged in a little longer.
  2. Use it until it turns off. Use the phone normally until it shuts down by itself.
  3. Charge without interruption. Charge to 100% while off, without unplugging.
  4. Restart. Turn it on and watch the reading for a day.
Samsung Galaxy A7 battery replacement

For brand notes, see Samsung battery calibration and how to check Xiaomi battery health.

Brand › Model › Repair listChoose your model, ask about the faultSamsung models

03How to get your phone to us

Visit our store

Hasanpaşa Mh. Söğütlüçeşme Cd. No: 192 (opposite the mosque car park), Kadıköy. Monday – Friday 09:00 – 20:30 · Saturday 09:30 – 20:30 · Sunday: Please ask.

Send it by post

Free two-way shipping with our contracted carrier from anywhere in Turkey. Send the device without its case, in a well-protected box, with a note giving your phone number and the fault.

Motorbike courier

Within Istanbul you can send your device by motorbike courier; just send us your address and the fault on WhatsApp.

FAQ

Frequently asked questions

01

Does the *#0228# code fix the battery?

No. Codes like this only show battery status on some older models; they do not change battery health.

02

How often should I calibrate?

Only when the percentage reading is wrong. Frequent full discharges wear the battery; do not do it more than once a month.

03

The battery still drains fast after calibration. What does it mean?

The battery may be worn. Check the battery health screen or have the battery checked for free.

04

Will a battery replacement delete my data?

Data is usually preserved during a repair; still, you need to back up your data before the repair starts (backups are the customer’s responsibility).

Customer reviews

What our customers say

★★★★★

Today we had an original battery replacement on our iPhone 14 Pro done by Can, and we thank him very much for his kindness, his speed and his professional support. You can come with no question marks in your mind. I recommend it 👍

Özgür Can K.Customer review · Translated from Turkish
★★★★★

They replaced the battery of an iPhone 11 in 20 minutes and handed the device back.

Selçuk S.Customer review · Translated from Turkish
★★★★★

I had the screen and battery of my 14 Pro Max replaced and I am very pleased. Thanks for your work.

Oğuzhan O.Customer review · Translated from Turkish
★★★★★

I think you will be pleased with their approach, their helpfulness and their care.

Our customerCustomer review · Translated from Turkish
★★★★★

This is the place I have shopped at with endless trust and sincerity for 20 years, since the Cep Market days. I am so glad you are here; Teknoway is the only place for me.

Cavidan T.Customer review · Translated from Turkish
★★★★★

A very good business with friendly staff, and they answered every question I had in full. Thank you, Teknoway.

ParlakplaystationCustomer review · Translated from Turkish
★★★★★

A company I have known for a long time that helps in every way it can. I definitely recommend dropping by and at least listening to their ideas and advice.

Murat Y.Customer review · Translated from Turkish
★★★★★

We had a screen protector fitted, and they gave us gifts I think were worth more than the screen protector. Most of all, thank you for the friendly welcome.

Mehmed P.Customer review · Translated from Turkish

From our customers’ reviews. All reviews

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Is your battery draining fast?

Battery faults are diagnosed free of charge. Send us the model on WhatsApp.

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