My Lenovo A820 has no change in battery power after upgrading the firmware, what should I do?

Dear Lenovo users, hello!

We apologize for the inconvenience caused by the use of your mobile phone.

According to the description, it may be caused by the abnormal battery metering data of your mobile phone system, or the abnormal conflict between the data of the newly upgraded new system and some old programs.

It is recommended that you try to back up important contacts, text messages and other data on the body, and then restore the factory settings of your phone to facilitate the stable operation of the system and see if it can be improved.

If the problem persists and the battery usage meter is not updated, it is recommended that you take the time to go to your local Lenovo after-sales service center and let the engineer help detect and solve it.

Lenovo authorized repair site inquiry.

The business hours of the maintenance site are usually from 9:00 to 18:00 from Monday to Sunday, and the stations will be slightly adjusted according to their own operations.

Hello, according to the problem you described, you can send your mobile phone to the service station for testing, the service station engineer will deal with the problem for you according to the test results, you can query the Lenovo mobile phone service outlets through the following link.

Hello. It's a pity! The battery level of the phone remains unchanged, it is recommended to restart the phone and try to restore the backup data to factory settings. If it is invalid, you can try to flash the machine, but it is risky to flash the machine. Or contact after-sales testing.

Officially authorized repair site inquiry.

You are welcome to contact us or visit Lenovo at any time

Consult to find out.

Actually, it's all the fault of upgrading the firmware.

1.Mobile phone battery problems are generally caused by improper use or expiration of life (e.g., overcharging the battery with a universal or mismatched charger).

2.It is very unlikely that there will be a hardware problem with the phone (the battery voltage detection IC is abnormal and the voltage change is not detected in a certain voltage range).

3.Problems with mobile phone software, phone application detection errors, or the use of third-party software to detect errors and false positives. (For example, the operation of software such as Power Manager 360 Power Saving King and Jinshan Power Saving is in conflict with the operation of Program Manager for false alarms.)

There are also third-party software that is not well compatible with mobile phone hardware, resulting in inaccurate display).

Enter recovery mode to empty the battery state.

Just find a power-saving rom.

Yes,Mine also prompts that s149 is the latest version,What should I do if I don't show the upgrade s150?,Please help the official answer。 Only 149 is the latest version???

Hello, there is an official S150 firmware upgrade, it is recommended that you go to the system settings About Phone to check the update and upgrade the firmware.

Hello. If you need to display the percentage in the notification bar, you can go to the main menu - Power Saving - Power Saving Settings - Notification Bar Display (check).

If the above operations are invalid after restarting your phone, and the abnormal phenomenon occurs after the system firmware is upgraded, we recommend that you try to restore the backup data to factory settings to rule out whether the old firmware data conflicts with the new firmware after the firmware is upgraded.

If restoring factory settings cannot solve the problem, it is recommended that you go to the Lenovo repair site in time to re-flash and upgrade the phone.

Inquire about authorized maintenance sites on the official website.

You are welcome to contact us at any time or visit Lenovo Lewen (for consultation.

If you want to show the battery percentage, the next 360 power saver can also be used.

Dear Lenovo users, it is recommended that you can check the battery percentage in the battery option of the settings option, if you have installed a third-party process cleaning software, it is recommended that you add the system process to the whitelist and then restart it in the software. Hope it helps you and I wish you a great life.

If the device cannot be turned on, it is recommended that you re-insert the battery and restart the operation, if it still cannot be turned on, please use the standard charger to connect for half an hour before trying to turn it on, if it still cannot be used, you need to go to the local maintenance site for testing and processing.

If the phone can be turned on normally, but the upgrade fails, please check the following methods:

3. If your device can be switched --- default storage location in storage, please switch it to a built-in memory card before upgrading.

4. If the above operations are invalid, it is recommended that you back up your data for factory reset operation and then upgrade again, to rule out whether it is caused by system abnormality, if it still cannot be improved, please go to the Lenovo maintenance site in time for testing, and it can be solved by flashing and upgrading;

5. It is recommended that you recall whether the device has been rooted or modified system file operations, if similar operations have been carried out, it may affect the ** upgrade function, it is recommended that you go to the maintenance station to upgrade by flashing the machine to solve the problem.

Lenovo authorized after-sales site inquiry:

I hope the above reply is helpful to you, and I wish you a happy life!