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.
Related
Sorry 4 the prev thread in wrong section .. then .. One S ( stock rom or another custom rom - with or without Sense ) supporta the usb-host mode ?
I am reasonably sure that out of the box, on stock ROM it does not support the ability to act as an USB host. Additionally, the microUSB on the phone is an USB slave socket, so it would need an adapter to connect a USB slave device to it anyways. (At least I have not yet seen a native USB-Host device with a microUSB socket.)
I am pretty certain it can be hacked into a custom ROM or application, however there are limitations to this. Commonly a device that is designed as USB slave (like the One S) will not be able to power devices through the USB port as regular USB hosts have to.
So IMO, in order to get it to work as an USB host you would need an adapter to connect the devices properly, a modified firmware or specialized app AND a way to externally power the USB slave you want to connect to the One S acting as USB host. The external power might a portable USB charger battery (like the Gumpack) or an Y-cable which is connected to a "real" USB-Host device just for the power (or a car/wall USB charger).
So, theoretically it would be possible, but not very practical. To the best of my knowledge it has not been done in the past because there was no need to. This however might actually change with the current trend towards non-expandable memory on newer phones... if demand rises I bet manufacturers would come up with solutions. Think small USB storage sticks with regular USB plug on one side for use on Notebook/Desktop and a microUSB plug on the other which contain a tiny battery (think Bluetooth headset size) to power the stick while attached to the phone and are charged while connected to a real USB Host port which is designed to deliver juice.
Further reading: http://en.wikipedia.org/wiki/Universal_Serial_Bus#Connector_types
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?
Hello Com,
Is it possible to be able to quick charge a tablet while having an active data connection at the same time?
Why I ask?
I want to build a solution where a tablet is connected to a pc. Both need to have a steady data connection as they share information and custom events. The tablet is for interacting with the user an will run a custom app. The computer is for controlling and operating other stuff the tablet is not capable of. Because of easy and fast substitutions, the tablet will have to stay in delivery condition - so modding the tablets hard-/software is out of question. The solution runs 24/7 and my current tests show that the power of the tablet is drained faster than it is recharged via the usb connection to the computer.
I tried to find accessories, but did not find any. All I found were ambigious information.
I know that the usb specification does not allow quick charge (more than 450mA) and a simultaneous data connection via a (single) cable. I thought of something like the splitted y-cable we know from external harddrives. Or maybe a custom adapter were you plug in an additional charger like those active usb hubs. I want to stay away from wireless data transmission (like using bluetooth and connecting a quick charger) if possible.
Therefor I ask of the general possibility of how to accomplish my task. If it is only possible with refaining from usb at all, then please tell me how.
(Please do not suggest solutions, without (at least theoretically) verifying them yourself first.)
Great thanks in advance.
I need to enable fast charge/AC on USB and keep it enable to communicate via USB. I need my tablet to charge as connected to AC and be able to transfer files in the same way as if I connect to a PC.
I will have a AC adapter in the middle powering the device 5V/2A, so I wont burn my PC USB port (I wont drain any power from the PC, just the D+/D-/GND Lines...). I know that I should not connect the tablet directly to a PC once I do this.
I have my device rooted, but I do not want to use a custom kernel. Is there anything I can change on my kernel to do this?
Once I think I saw some change that I must do in a system file to be able to do this, but I'm unable to find it now...
Thanks for any tip,
JS
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.