I am using a usb tethering app for Internet access between 2 phones, and my host phone's battery rapidly drains through the usb connection.
I tried an app to disable charging the other phone and this disconnected the data.
From my search I understand android requires voltage in the usb cable to make a data connection. Seems to discharge at 500 mA by default.
Is there a way to stop or reduce the discharge to a minimum, just enough to maintain data connectivity? An app or magisk or xposed module? Some terminal commands? Both devices have root access.
I have also tried usb ethernet connectivity which also causes a similar rapid draining of the host device battery.
Xiaomi mi5 rooted (usb type C port)
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I often use the combination of a laptop with a smartphone on my way from home to work and back: the smartphone is used as an internetmodem for the laptop, and the USB-cable is used for the data-transfert between the 2.
Unfortunately the battery-capacity of the laptop is not enough to support both the use of the laptop and meanwhile charging the smartphone battery. So I would like to prevent the phone-battery to drain (too much) power from the laptop-battery. I can't switch off "charging through USB" in the phone since USB is the only available option to charge it. And -as I have learned from another thread in this forum- cutting the powerleads is no option too since the data-connection requires a minimumcurrent in order to work.
But what if I would modify the USB-cable with a small electronic circuit that would limit the current through the USB-cable to a value of about 50mA? That would be enough to enable the dataconnection but would prevent my laptopbattery being drained by the phone. Does anybody here have any experience with such a cable?
Is there a similar interface to http://electronics.stackexchange.com/a/46918 to force charging while the device acts as a USB host?
Does anyone know which resistor value is required to otherwise enable charging?
Fr4gg0r said:
Is there a similar interface to http://electronics.stackexchange.com/a/46918 to force charging while the device acts as a USB host?
Does anyone know which resistor value is required to otherwise enable charging?
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It should certainly work, as the phone should be able to act in OTG mode while being charged at the same time, when placed in Motorola lapdock.
There are (at least) some 100k and 200k (between pin 4 and 5, I assume) tests present in kernel (emu detection) that switch the behaviour, but I didn't need to look into it too closely so far. You'll have to study the source and experiment...
@Fr4gg0r
I have recently bought this USB OTG adaptor: http://www.ebay.com/itm/New-Host-OTG-Power-Cable-Micro-USB-Male-to-USB-Female-for-Galaxy-Note2-S3-S4-/191145599519?ssPageName=ADME:LCE:3160
It's the first OTG adaptor fully working for me. All my USB Flash drives are working without problem. It's also charging my Photon Q while using USB host.
Is there a way to charge an android device while it is connected to the PC?
Assume the device is draining its battery very fast due to some video or gaming activity and the PC cannot keep battery level stable. I would like to connect it to a USB charger at the same time, does such an adapter exists? I am afraid of damaging the PC or the tablet.
It is important to note that I don't need the android to work in hosting mode (OTG) but just for file transfer and adb port forwarding.
Download: https://play.google.com/store/apps/details?id=org.bramantya.stopcharging&hl=en
*** ROOT REQUIRED ***
Bored with various apps that make your phone charge faster?
Want to stop charging your phone's battery when connected to USB?
You are a developer that often connect their phone via USB and don't want the battery to suffer?
Disable USB Charging will disable usb charging (obviously..). Allowing you to connect your phone via USB without straining your battery again and again and again.
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Please mention your Android version and ROM if it's not working for you. Thank you.
Could some one please suggest a way in which I can avoid running down the phone's battery when accessing the internet via a hard wired connection into the USB micro port of my mobile phone?
Do you think this would work?
https://www.ebay.co.uk/itm/Ethernet-Adaptor-For-Fire-TV-And-Fire-TV-Stick-Chromecast-Micro-USB-To-RJ45/312268571554?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D1%26asc%3D52543%26meid%3D2e2122594617494089d83d6877e7d6e4%26pid%3D100005%26rk%3D4%26rkt%3D7%26sd%3D323484176731%26itm%3D312268571554&_trksid=p2047675.c100005.m1851
For this purpose I do not want to access the internet on the phone by wireless.
Robin
I have tried:
IA micro to usb adapter: Plugable: Model USB2-OTGE100. It does not have a power supply and uses my phone's battery to power the adapter.
A Micro-B usb hub that has 3 standard usb outputs and one power input. It also has a Charge to OTG switch and it does not do what I want as it does not charge the phone at the same time as browsing the internet.