Questions tagged [charging]

For questions specifically about issues with battery charging or power supply.

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35 views

Why does my phone burn out USB cables when plugging them into my car?

I have an Oppo A73 phone, and over the last week it has started burning out USB cables (puff of smoke, cable no longer charges) when plugging it into my car (2015 Suburu Outback). It had never done ...
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1answer
73 views

How does Battery Management System work (at the hardware-interface level) ? And how is idle self-discharging of batteries handled?

I came across the following when I was reading up about fully drained batteries in phones: If the phone is OFF for a month, then it is probable that the battery has gone down to a point that the BMS ...
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31 views

What are the various technical specs of a fast charging cable?

What technical specs do I need to look for to know a cable will be compatible with my phone? I just bought a new Motorola G7 supra and none of my existing USB type C cables work with it. I plug it in ...
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21 views

Moto e4+ fast charging issues

My moto e4 plus is 2yrs old.Suddenly at 75-80% it's charging rate drops then after a while suddenly it charging very fast after that stoppage.can anyone tell me reason !please
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2answers
1k views

How do I change the Battery Percentage that corresponds to a Voltage in Android

My original Li-ion has 3000 mAh capacity. I've modded my device to have a total of 7000 mAh capacity now. The enhanced capacity means that my percentage is not displayed accurately anymore. About ...
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41 views

Getting data of phone with dead battery

I have to get data off an old Zuk Z2 Plus that was working when it got replaced by a new phone and left lieing around for a year or so. Now it does not boot any more. When I plug in power, the screen ...
26
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1answer
6k views

Don't charge the battery but use connected power to run the phone

Answers to this question Is power consumed from battery to run the phone when charging? explain how charging while phone is in use does both - charging the battery and powering the on going activities....
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0answers
245 views

Connecting Samsung S9 to MacBook's USB Type-C behaves like charging - not charging - charging - etc

I am trying to use my Samsung S9 to test a mobile app. I activated the "Developer options" and these are my "USB settings" (opened when I tap on the "Android System" notification): And when I "Tap ...
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1answer
51 views

Is it a bad idea to let your phone keep charging all the time?

I read somewhere that long periods of charging can be bad for the battery and the best level to keep your battery at is around 50%. Is this true? If it is then after how long will the battery show ...
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0answers
1k views

Android system keeps resetting default USB configuration upon PC connection

Whenever I'm connecting my Samsung Galaxy A40 running Android 9.0 to a laptop or PC, I'm getting an annoying prompt to allow data transfer, and the following setting which I had set to "Charging phone ...
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2k views

Is it possible to boot a Android smartphone without battery with charging wire on?

Problem The title of this post seems a funny challenge. But frankly, there are a lot of worthy points involved in this question. If a Android phone support rapid charging. If its battery is removed, ...
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44 views

Samsung Tab A6 won't leave battery screen or turn on

I'm currently having issues turn my A6 on, in that it simply won't start up. I have tried: Holding the Power and Volume Down button, Holding the Power button for 30 secs, changing cables, changing ...
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782 views

fastboot oem off-mode-charge 0 Ressetting back to “1”

Using "Gzosp-rolex-riva-8.1.0.Stable.1.0-UNOFFICIAL-20180622-1133" on "Redmi 4A" Upon Using fastboot oem off-mode-charge 0 its working for ONE TIME only, Once the phone powered on, its getting back ...
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1answer
595 views

Meaning of two low battery screens on Acer Iconia tablet?

According to https://community.acer.com/en/t5/Android-Tablets/Iconia-tab-10-A3-A20-won-t-charge/m-p/513098/highlight/true, Hello, my tablet was working fine for a year and suddenly won't charge up. ...
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1k views

Phone stuck at 0% battery

I have a Moto G phone. I'm using LineageOS. Yesterday I notice my phone went dead. When I press power button, a white light in the camara flashes three times, which I understand to be no battery. It ...
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0answers
84 views

Charge and USB flash drive through same port

I have a Pixel 3. I'm trying to use an external USB connected microSD card for recording long videos in a vehicle. However, even with wireless charging I'm finding that the power supplied is ...
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1answer
945 views

Pixel 3a charging over computer USB connection

I have an Pixel 3a device that I connect to a Linux computer via USB cable (A to C). Sometimes when I plug in the device, the notification on the Pixel 3a says, "Android System - Charging this device ...
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1answer
4k views

What is signified by the yellow triangle with a black exclamation mark on Samsung devices

My friend has a Samsung Galaxy S9. Every now and then it refuses to charge because of moisture being detected in the port. However; upon completely discharging this once; it showed a ⚠️ mark when the ...
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1answer
181 views

Is it safe to charge tablet from phone via OTG cable if tablet's adapter is 5.2V?

Is it safe to charge tablet from phone via OTG cable if tablet's adapter is 5.2V (a bit above)?
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1answer
6k views

Battery drains when phone is turned off

I have a used Samsung Galaxy S3 Mini GT-I8190. When I shut down the phone the battery still drains. The longer I leave the battery in the shut down phone the more charge it looses. Typically the ...
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1answer
71 views

Should warnings about not charging your phone at airport/public usb ports be taken seriously?

There are many articles on the internet saying that charging at the usb ports available at the airport and public places can cause your phone to get hacked. Is there any any truth behind this? If ...
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1answer
36 views

Quick charge adapter on not supported devices

The adapter which comes with my new phone has Qualcomm Quick Charge 3.0 label on it. The output reads: 5V-3A / 9V-2A / 12V-1.5A. Is it safe to use it with my old phones? For example, if I have a very ...
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2answers
10k views

Is the battery cycle count stored on the battery or the device?

I downloaded an app Phone INFO which shows a number of stats, particularly "Battery Discharge Cycles". I want to know if this number is being retrieved from the battery (i.e. it's just the number of ...
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0answers
52 views

Charging problem. Please help

My phone (Note3, CustomOS: Phronesis) got a charging problem last night. It does not charge properly when running or if the screen is off now. Usually the LED went on while charging but it stays off ...
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1answer
779 views

“Moisture has been detected” even after 2 weeks, also in safe mode

Two weeks ago my Samsung Galaxy S10e got a bit wet while in my pocket under heavy rain. The phone did not go inside water, but it was pretty wet. Since then, I got this message from time to time when ...
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0answers
289 views

Galaxy s9+ not charging via USB-C cable and not quick charging at all

I ran into a problem with my Galaxy s9+ recently, it won't charge at all using my Samsung 25 Watt Wall Charger and also won't charge using my Aukey 26800mah power bank when connected via USB-C. It ...
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1answer
196 views

How to get fast charging diagnostics information

I want to find out what type of Fast Charging is supported by different combinations of Android device, cable and charger. I have a variety of devices, from different manufacturers and with different ...
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1answer
26 views

Android won't turn on at all

Basically the phone won't turn on at all, not normal boot, not recovery mode, not even the battery percentage show up while charging (just the battery icon with lightning, that's it). it stucks on one ...
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0answers
8 views

Having trouble powering up my phone with another power source

I am having a bit of trouble powering my phone I got a Lenovo A7000 plus which is the same as K3 Note version and this phone uses BL243 battery Here is some information about the battery Typical ...
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1answer
22 views

Phone gets stuck after charging

My phone is somewhat older sony xperia v. still running on android v4.1 jelly bean. recently it behaves abnormaly. whenever I put it in charge (wall adapter or usb plugged into a laptop) , it only ...
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0answers
408 views

Is it a Kernel or a ROM that provides power_supply battery files?

Long story short I was installing custom ROMs to my Android device and one thing that stays in place regardless of ROM I use is a wrong battery stats monitoring. The device always behaves like it's ...
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0answers
23 views

New Samsung Note 9 battery charger compatibility

I just bought a new Samsung Note 9 (Exynos 9810). Little did I know that the model I ordered was the EU version and not the US version, so the charger I received was unusable with any of my power ...
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1answer
199 views

Plugging phone into laptop charges laptop instead of phone

When I plug my father's Xiaomi 5X into my MacBook Pro, it shows up as a charger on the MacBook and I don't get the usual USB options on the phone. Tried it on two Macs with same result. Also tried my ...
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1answer
71 views

Power empty android (Samsung) - cannot charge

Samsung SM-T580 power became empty and stopped. Connection with charger result in flickering (black) screen with the charge icon showing. I used several cables and adapter. After many hours the tablet ...
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0answers
8k views

How can I fix a charging problem on Moto G5 Plus?

A Moto G5 Plus device (Android 8.1.0) was charging and performing normally with a healthy battery response. One morning, instead of being at 100% (expected after charging all night), the phone ...
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1answer
342 views

Leaving phone plugged in all the time?

I have a spare OnePlus One that I use for home automation stuff (RM Plugin, Tasker, etc.) I leave it plugged in all the time. Sometimes the phone does get quite hot. Just today, wanting to do more ...
2
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0answers
182 views

Why does my Samsung Galaxy S8 Active no longer “Fast-Charge”?

I bought a refurbished Samsung Galaxy S8 Active in excellent condition about 6 months ago, and it came with the standard manufacturer-provided power adapter and cable for charging (Model: EP-TA20JBE, ...
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1answer
57 views

Power on when charging but only when battery level is greater than 20%

I have recently tried to fit a tablet into my car and I came across a problem with waking up the device without using the power button. My solution is to boot the device whenever it is charging, but ...
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2answers
55 views

Phone not charging

My phone doesn't charge at all, even when is charging while switched off. And I have tried it with many chargers and battery. But same thing keeps happening
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1answer
130 views

Is it bad if a cable is higher current rating than a charger?

First time asking here, but Is there any potential harm in using a charging cable with a higher current rating than a charger it is connected to? It's a tablet (Asus P027) and its charger is 5V/2A ...
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0answers
292 views

Unusual Decrease in Charging Amps

I got to know about the Ampere app, which basically tells you how much amps does your phone draw while charging. I have noticed that my charger keeps on decreasing from 680 mA to 0 mA in 5 minutes and ...
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0answers
83 views

Android smart phone wont turn ON

When I try to turn On my LG L7, it shows Device temperature too high or low. Please move to another place to charge. And it wont turn ON. It started after I tried to measure voltage between the ...
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2answers
609 views

Can I safely charge a SGS9 device with a 5.2V MacBook Pro 2018 USB-C charger?

Can I use 87W USB-C Power Adapter for MacBook Pro to safely charge a Samsung Galaxy S9 device? I'm curious as on the charger it says the output is 5.2V, while the phone seems to require 5V. The specs ...
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1answer
518 views

Make device take power only from charger when the battery is full

I made a device that is up and running (screen is on) 24/7 and connected to AC charger. After only 1 year, the batteries of these devices are dead. I don't really understand since the device is ...
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1answer
2k views

Does Huawei's super charging affect the battery?

I have a Huawei P20 pro and it came with a "super charger" that can take full charge the phone's battery really quickly. Sometimes in less than an hour. I wonder if this affects the battery's ...
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1answer
137 views

motorola droid turbo battery not charging

I bought droid turbo about five months and I upgraded it to marshmallow. Unfortunately, it fell on the ground four times, then the fourth time it stopped charging. When I connect the charger, it ...
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1answer
736 views

Macrodroid: I want a repeating alert when battery is less than/over than x%

I want a repeating alert when battery is less than/over than x%. I have a pair of alerts (Using MacroDroid) that are triggered by a battery level change. One of less than 35%, and one of more than 85%...
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1answer
1k views

How can I get Ethernet adapter and still be able to charge my tablet

I found this adapter to add Ethernet to my android phone, but looks like doesnt power the device. Is there a way to have Ethernet connection and still be able to charge the device at the same time? ...
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1answer
91 views

Is my battery damaged?

I have an HTC 10 running stock Oreo with Sense, not rooted and S-ON. I bought this second hand and don't know whether the issue came up as the phone was upgraded to Oreo, or whether it had always been ...
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1answer
40 views

Cell Phone is unresponsive, but after it ran out of power it was chargable again?

So yesterday my cell phone was acting strange, it didn't respond to charging and/or could not turn on (no charging light and blank screen). Today (I assume after it ran out of power), it is charging ...

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