I have a simple Qi power mat that I use for charging my Nexus 4 overnight. It works quite well - a little too well in fact as it charges to full with about 6 hours left of the night. It then "disconnects" from the wireless charger and begins to discharge as if it were just sitting not on a charger.
If my backup is running or some other background tasks occur I end up with only 80% battery left in the morning which is annoying.
The way to restart charging is to remove it from the charger and place it down again - not something I can do while I am sleeping.
I was wondering if there would be a software way of 'resetting' the wireless charging so I could use something like tasker to fool the charger into thinking it had just been placed down again when, for example, the charge drops below 95%?
Would this be better in the Accessories or Developers forum?
Related
For some reason, every couple of days when I plug my phone in to charge the battery overnight I end up getting an alert (about 4 in the morning!) to change the battery because mine is dead, along with the back up battery, and then the phone shuts off within about a minute. Luckily I have another battery, which I then put in, and then put the dead battery in the "back up battery" slot in the cradle to charge, which it does. I don't know why this happens but it is very frustrating. I am afraid of this happening on a trip out of town where I won't have the ability to use my cradle, unless I bring it which is a big hassle. I don't know what to do.
This IS vexing. By the fact that it charges the extra battery - we know that the power transformer is connected. Since the device does not seem to be charging (possibly even discharging?) - it seems that either the connector on the charging base or the connector on the device itself are bad.
Have you used the power dongle connected to the power transformer to attempt to charge the device? This would tell you if it's the charging base or the device. If it charges outside of the base, it's the base - if not, it's the device.
Best of luck!
How are you charging the battery - from mains power or through the USB?
I had a situation where I was only using USB power to the cradle and although this worked most of the time, I noticed that if the battery was already low (<50%) then the battery seemed to discharge rather than charge.
So the trigger in your case may be the amount of charge left in the battery before you start re-charging it.
I think other people have reported similar discharging situations, so some other ideas might emerge from a search of other threads.
Hi - had the transformer since the May launch - pretty happy with things. However in the last couple of days, I have noticed something seems to be wrong with the keyboard dock. It no longer seems to hold any charge. Used to be could charge from empty (blinking orange) to full (green) in a few hours or so. Now I charge overnight and it is still orange. Irrespective of anything, when I have the dock on the move - if I plug in the tablet - the tablet still drains (no lightning bolt to indicate it is charging from the dock as previously the case).
Has anyone else seen this problem? Is there a software fix or do I have to return the dock?
What happens with the tablet connected to the AC adapter alone? Does it charge?
I think the dock uses the 15V circuit on the charger and the tablet uses the 5V circuit.
Have you left the AC adapter plugged into a socket for a long time? Unplug it for about half an hour, then plug it back and test.
I recently had this issue too. The dock worked fine and held a charge. Then one day it was at 0% charge, and I plugged it in but it kept blinking orange, even when I charged it over night.
This is a known, but rare, issue with the docks. If you let the keyboard dock drain to 0% and keep it like that for a few days, for some reason it "locks" into always staying at 0%. The battery can never charge again.
The way to confirm this is to download the Dual Battery Widget from the marketplace. It is supposed to show one battery for the Tablet, and a second battery for the Dock. If you have the dock plugged in, and the tablet connected to the dock, and the Dock Battery Widget part says "N/A", then you have the problem I had.
I exchanged my dock at the store. My bad dock was a B50 revision. My new dock is a B60 revision and does not have the Battery Drain issue that people have been discussing (it passes the Test the ASUS representative posted).
I am hoping that this new dock will not have the "falls to 0% and can never recharge" issue my first dock had.
Long story short, I would recommend that you exchange or RMA your dock. The battery in it is bad.
I own a Galaxy S2. I have tried it using for navigation many times only to find that the battery discharges fully within 2 hours even if the phone is connected to a car charger. I used to think may be its because my car charger doesn't provide enough current to maintain the charge. But recently I found out the culprit. After around 20 minutes of use, the phone battery starts heating up, and it stops charging. I verified this with CPU-Z. It clearly shows battery overheated, power supply connected and not charging.
I was wondering if S4 also has similar issue. Has anybody used it for more than 2 hours with Google Navigation continuously while connected to car charger?
unni_kmr said:
I own a Galaxy S2. I have tried it using for navigation many times only to find that the battery discharges fully within 2 hours even if the phone is connected to a car charger. I used to think may be its because my car charger doesn't provide enough current to maintain the charge. But recently I found out the culprit. After around 20 minutes of use, the phone battery starts heating up, and it stops charging. I verified this with CPU-Z. It clearly shows battery overheated, power supply connected and not charging.
I was wondering if S4 also has similar issue. Has anybody used it for more than 2 hours with Google Navigation continuously while connected to car charger?
Click to expand...
Click to collapse
The most I have used it for is about an hour and half, and while the phone did heat up, it did continue to keep charging while connected to my in-car charger (just a cheap one). I can't remember whether the charger was able to keep up with the discharge though, I think it did. I was driving in bright sunlight, so I had screen brightness on max throughout that time.
.Astiak said:
The most I have used it for is about an hour and half, and while the phone did heat up, it did continue to keep charging while connected to my in-car charger (just a cheap one). I can't remember whether the charger was able to keep up with the discharge though, I think it did. I was driving in bright sunlight, so I had screen brightness on max throughout that time.
Click to expand...
Click to collapse
I've found that the USB cable can have a big impact on the charging current. I had the same problem with my car charger not keeping the phone charged, even though I was using a 2A charger. When I changed the USB cable I managed to quadruple the charging current (from 300ma to 1200ma) and solved the problem (I measured the charging current using the Galaxy Charging Current Lite app).
HTH
itm said:
I've found that the USB cable can have a big impact on the charging current. I had the same problem with my car charger not keeping the phone charged, even though I was using a 2A charger. When I changed the USB cable I managed to quadruple the charging current (from 300ma to 1200ma) and solved the problem (I measured the charging current using the Galaxy Charging Current Lite app).
HTH
Click to expand...
Click to collapse
In my case, I believe it was not because of the charging current or cable. I was trying with a car charger capable of charging a laptop, using the wall charger and cable which came with the phone. When the mobile stopped charging, I checked in CPU-Z app. The app was clearly showing status as "power supply connected, not charging and battery overheated". If I unplug the USB cable and connect it back, it will start charging again!
To make sure that I didn't miss anything, I will try with the app you suggested.
Just to update: The Galaxy Charging Current Lite doesn't seem to work with my Galaxy S2. It doesn't show any value.
hey guys i bought my niece a 2012 nexus 7 it has the axus charge with different usb cable but it charge so slow
i was wondering if there is a rom with better charging speed
i havent root and is wifi version
What does "so slow" mean? As in, how many minutes to change 10% in charge?
One thing you can do to troubleshoot things is to see how long it takes to charge the tablet when it is completely shut off. It should be pretty obvious that "the ROM" has absolutely nothing to do with that scenario. Wait till the tablet is discharged to about 10%, shut it off, and charge it for 90 minutes. If it is charging normally it will be close to 70% charge when you boot it back up.
If your tablet charges slowly in that case, then there is a problem with the charger, cable, or battery in the tablet - not the ROM. So, you should surely check that out first before you start worrying about software.
A nominal N7 (2012, WiFi) will charge from 5% to 100% in about 150 minutes: 2.5 hours. That's with a STOCK ROM. If you look at the battery capacity, that works out to a minimum 1.73A charging rate. (4.325 Amp-hours / 2.5 hours = 1.73 A). It's actually higher than that because a certain amount of charging current is "lost" to heat generation while charging.
The tab will ALWAYS charge slower than that if it is in use, especially if the screen is on and the owner is doing things like streaming data or playing games. If it is under heavy use, the tablet itself could easily dissipating 1.0 A of current... so in that case the 2.5 hour charging time would be over twice as long: over 5 hours.
The "fast charge" ROMs are not what you are thinking. "fast charge" there means "fast charge under conditions normally restricted to low currents when data transfer is taking place". If you are using a charge-only cable (such as the OEM charger and cable), the tablet should always be able to draw close to 2A of current with ANY ROM - there is no data connection present, and the tablet is not restricted in the current it can draw.
The ROMs don't really throttle the battery charging rate except in that very specific condition: when there is a data connection present. So, worrying about which ROM is installed really only applies to people that want to use a Y-cable and a live USB data connection (tethering or an OTG gadget attached) - for instance in car installs or maybe with data tethering via USB.
good luck
bftb0 said:
What does "so slow" mean? As in, how many minutes to change 10% in charge?
One thing you can do to troubleshoot things is to see how long it takes to charge the tablet when it is completely shut off. It should be pretty obvious that "the ROM" has absolutely nothing to do with that scenario. Wait till the tablet is discharged to about 10%, shut it off, and charge it for 90 minutes. If it is charging normally it will be close to 70% charge when you boot it back up.
If your tablet charges slowly in that case, then there is a problem with the charger, cable, or battery in the tablet - not the ROM. So, you should surely check that out first before you start worrying about software.
A nominal N7 (2012, WiFi) will charge from 5% to 100% in about 150 minutes: 2.5 hours. That's with a STOCK ROM. If you look at the battery capacity, that works out to a minimum 1.73A charging rate. (4.325 Amp-hours / 2.5 hours = 1.73 A). It's actually higher than that because a certain amount of charging current is "lost" to heat generation while charging.
The tab will ALWAYS charge slower than that if it is in use, especially if the screen is on and the owner is doing things like streaming data or playing games. If it is under heavy use, the tablet itself could easily dissipating 1.0 A of current... so in that case the 2.5 hour charging time would be over twice as long: over 5 hours.
The "fast charge" ROMs are not what you are thinking. "fast charge" there means "fast charge under conditions normally restricted to low currents when data transfer is taking place". If you are using a charge-only cable (such as the OEM charger and cable), the tablet should always be able to draw close to 2A of current with ANY ROM - there is no data connection present, and the tablet is not restricted in the current it can draw.
The ROMs don't really throttle the battery charging rate except in that very specific condition: when there is a data connection present. So, worrying about which ROM is installed really only applies to people that want to use a Y-cable and a live USB data connection (tethering or an OTG gadget attached) - for instance in car installs or maybe with data tethering via USB.
good luck
Click to expand...
Click to collapse
thanx man now i get it it won charge fast like the note 3
i was playing fifa 14 and didnt charge at all it was loosing power
mrej201 said:
hey guys i bought my niece a 2012 nexus 7 it has the axus charge with different usb cable but it charge so slow
i was wondering if there is a rom with better charging speed
i havent root and is wifi version
Click to expand...
Click to collapse
Get a better cable. I was using a third party cable on my Nexus 7 for a while and realized it was only charging about 10-15%/hr.. Changed the cable out for a better one and it charges at the normal rate now, 30%/hr or so.
Do check for loose connections for both battery connector and usb ribbon connector (under speakers). I’ve opened the back cover to check after slow charging problems and was solved by opening and clipping back the usb ribbon connector. Charging's back to normal now.
http://androidforums.com/nexus-7-20...esting-while-diagnosing-charging-trouble.html
Lim Wee Huat said:
Do check for loose connections for both battery connector and usb ribbon connector (under speakers). I’ve opened the back cover to check after slow charging problems and was solved by opening and clipping back the usb ribbon connector. Charging's back to normal now.
http://androidforums.com/nexus-7-20...esting-while-diagnosing-charging-trouble.html
Click to expand...
Click to collapse
thanx bro
Does anyone else have any experience with Qi wireless charging receivers for the S4? I bought one from eBay at the end of last year (item no
151128038769), and it was fine for the first few months, but now it doesn't seem to charge the phone at all. I get a popup message when the phone is placed on the correct part of the charging mat (although this message doesn't always pop up as reliably as it used to), and the charge indicator displays in the notification bar, but if I return to the phone half an hour later it has actually lost charge.
I've tried this with two different charging pads, from two different manufacturers, and neither charges the phone, even though the phone gives the impression that it is being charged when I first place it on the mat. Charging using a cable still works fine.
I was wondering whether others had experiences of wireless charging?
Update: I just checked the charge status with the Galaxy Charging Current Lite app. When the phone is on the pad the charging current shows as 640mA (which should be enough to charge?), but the phone is actually losing 1% of its charge every few minutes.
???
are you using an adapter cover or a connector for the qi charging?, maybe they're not aligned well
also,i just checked and i get 460mA via simple usb/PC charging. and it's still charging. (really slow, but charging.)
yonye87 said:
are you using an adapter cover or a connector for the qi charging?, maybe they're not aligned well
also,i just checked and i get 460mA via simple usb/PC charging. and it's still charging. (really slow, but charging.)
Click to expand...
Click to collapse
I'm using a receiver insert. It sits on top of the battery, and has a flap which covers the charging terminals higher up the phone. I'm more than happy with 640mA as I usually charge it overnight. I just don't understand why it's losing charge instead of charging.
if it's charging with 640mA, but still your phone is discharging, then maybe your phone is draining the battery.
try to close everything, such as wifi, GPS, mobile data etc. and then check if it's still not charging.
also, you can try changing to a a different receiver, if you have one
btw, what about normal charging? does it charge normally?
yonye87 said:
are you using an adapter cover or a connector for the qi charging?, maybe they're not aligned well
also,i just checked and i get 460mA via simple usb/PC charging. and it's still charging. (really slow, but charging.)
Click to expand...
Click to collapse
yonye87 said:
if it's charging with 640mA, but still your phone is discharging, then maybe your phone is draining the battery.
try to close everything, such as wifi, GPS, mobile data etc. and then check if it's still not charging.
also, you can try changing to a a different receiver, if you have one
btw, what about normal charging? does it charge normally?
Click to expand...
Click to collapse
Yes it seems that there's something that's draining the battery faster than the Qi pad can charge it. I've tried a reboot but it made no difference.
"Normal" charging using a USB cable is fine (and quick). I've just set up the Better Battery Stats app to see what's causing the drain while it's on the charging pad.
I don't have another charging receiver to try (only another charging pad, which exhibits the same behaviour)