Hi, I use a Google Nexus 5 smartphone as the hub for my smart home. This means I leave it plugged in all the time. However twice now the battery has expanded and popped the back off the phone.
I don't really need a battery in there at all as the phone is mains powered, but if I remove the battery the phone will no longer boot when connected to the mains.
Is there a way I can hotwire something inside so it will completely bypass the battery but will still boot up? I'm experienced with soldiering & multimeters.
Thanks!
CJSnet said:
Hi, I use a Google Nexus 5 smartphone as the hub for my smart home. This means I leave it plugged in all the time. However twice now the battery has expanded and popped the back off the phone.
I don't really need a battery in there at all as the phone is mains powered, but if I remove the battery the phone will no longer boot when connected to the mains.
Is there a way I can hotwire something inside so it will completely bypass the battery but will still boot up? I'm experienced with soldiering & multimeters.
Thanks!
Click to expand...
Click to collapse
The most near thing you can do is connect another battery's positive and negative to your phone's battery connectors and then just put a 100k resistance between negative and the other pin (assuming it has 3, if it has 4 just try any of them). Don't try putting USB wires there as they deliver 5v and your phone needs 3.6~4v.
Sent from my [device_name] using XDA-Developers Legacy app
Related
I am trying to figure out why my DroidX will not charge fully all of the sudden. I plugged it in yesterday to a wall charger for about 2 hours when the battery was at 50%, can back after 2hrs, and it was still at 50% even though it showed the charging icon the whole time. I rebooted it, and plggeed it into my computer's USB port, and set the USB option to "Charge only". Came back this morning, after it sat there for 6 hours and same thing - it is just maintaining the current battery level, but not charging it higher.
I have only owned it for a week, and the only change between now and when it was charging properly was that I installed a wireless tethering app, however, that runs on demand, and it has not been open or running. WiFi and GPS are also completely turned off.
Anyone else experienced this? I assume unless I keep it plugged in 24/7 now, it will eventually die all the way down!!
p.s. - I also tried letting it charge while it was completely powered off, but same thing. Shows that it is charging but just maintains current level.
crobs808 said:
I am trying to figure out why my DroidX will not charge fully all of the sudden. I plugged it in yesterday to a wall charger for about 2 hours when the battery was at 50%, can back after 2hrs, and it was still at 50% even though it showed the charging icon the whole time. I rebooted it, and plggeed it into my computer's USB port, and set the USB option to "Charge only". Came back this morning, after it sat there for 6 hours and same thing - it is just maintaining the current battery level, but not charging it higher.
I have only owned it for a week, and the only change between now and when it was charging properly was that I installed a wireless tethering app, however, that runs on demand, and it has not been open or running. WiFi and GPS are also completely turned off.
Anyone else experienced this? I assume unless I keep it plugged in 24/7 now, it will eventually die all the way down!!
p.s. - I also tried letting it charge while it was completely powered off, but same thing. Shows that it is charging but just maintains current level.
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Click to collapse
this is not normal ,while in the wall charger it should charge all the way and the same on usb but just slower ,if this problem persist i would bring it to VZW and get a knew batt or phone or both since you have only had it a week
It may not be the phone or the battery. It's probably a faulty DC adapter which is not delivering the proper amperage. I just had this problem with my Slingbox. It would light up but the lights looked dim and I couldn't connect to it. A new adapter fixed it.
(Edit) I just reread your post and noticed you are charging it on your PC's USB port. Try the wall charger or another PC. Some PCs don't put out enough juice to charge.
Sent via XDA App on my Droid X
BBJohnnyT said:
It may not be the phone or the battery. It's probably a faulty DC adapter which is not delivering the proper amperage. I just had this problem with my Slingbox. It would light up but the lights looked dim and I couldn't connect to it. A new adapter fixed it.
(Edit) I just reread your post and noticed you are charging it on your PC's USB port. Try the wall charger or another PC. Some PCs don't put out enough juice to charge.
Sent via XDA App on my Droid X
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Click to collapse
This is somewhat true. The phone should charge with less power regardless of the source. You notice this most on say a USB hard drive and this is why you have y cables sometimes on the drives that take more power. Does the computer you happen to be charging it on happen to be a Laptop?
FYI - I charge from a desktop PC that has a 1000W corsair powersupply and hig end motherboard.
With that asie though, I was able to get the charging back - works fine after I did a hard reset. Most everything was backed up via Google, so all I had to do was rearrange my icons on home screen and change a few android settings.
I still have all the same apps, so I do not know what caused it. Whatever, it is fine now, but if it happens again I will take it in - I do not want to have to hard reset every few weeks. (I have the $6 a month full protection plan, even if I lose it, it gets replaced)
Hello,
this is a bit of a custom job. I want to take my Droidx and make it a dedicated display in my car. My issues are the battery is shot and buying another is more investment than I prefer. also the battery is not going to work for what i'm doing because it will not be on charge as frequently as it need to get a full charge.
so here is what i want to do. I want to hard wire the battery terminals to a 3.7 vdc source and use that as the primary power to the phone. and use the usb power to wake it on entry and while the ignition is on. right now i've got the usb cord without the battery and it works fine. but I wanted to maybe use the battery/usb to wake it. Anyone able to power the phone on the terminals for the battery?
Thanks
-xpbr2000
xpbr2000 said:
Hello,
this is a bit of a custom job. I want to take my Droidx and make it a dedicated display in my car. My issues are the battery is shot and buying another is more investment than I prefer. also the battery is not going to work for what i'm doing because it will not be on charge as frequently as it need to get a full charge.
so here is what i want to do. I want to hard wire the battery terminals to a 3.7 vdc source and use that as the primary power to the phone. and use the usb power to wake it on entry and while the ignition is on. right now i've got the usb cord without the battery and it works fine. but I wanted to maybe use the battery/usb to wake it. Anyone able to power the phone on the terminals for the battery?
Thanks
-xpbr2000
Click to expand...
Click to collapse
The phone works without a battery. Maybe bypass it and connect to USB?
Sent from my SCH-I605 using xda premium
You'll need to have a battery or something to keep it from just turning off when you turn off the car, won't you? I looked into doing something like that with the RasPi, and I you're not supposed to just remove the power supply.
Or can you wire it to wear it has power when the car isn't running?
sghsmorgan said:
You'll need to have a battery or something to keep it from just turning off when you turn off the car, won't you? I looked into doing something like that with the RasPi, and I you're not supposed to just remove the power supply.
Or can you wire it to wear it has power when the car isn't running?
Click to expand...
Click to collapse
if i could figure out what the battery supplies the phone then i could wire a 3.7v source to the battery terminals on the phone.
I've had this system wired up for a couple months and it works great. the only issue i've had is the age of this battery makes it not take a charge. so in the heat of the day i get in the car and the battery temp is 100+ the phone is dead because the battery doesn't operate. and the charger can't charge the hot battery and keep the phone powered. I never liked the idea of a battery inside the car. heat + battery = boom (maybe not but it could cause a big mess and damage the phone.
the question i need answered is what is required for the phone to run? what do each of the battery terminals do? obviously one is ground (marked) and one is positive (also marked) the middle terminal has to do with a temp or charge signal. it doesn't power on just the positive and negative to the best i can test it. maybe i'm doing it wrong.
and i have looked at a rasPI. we have one. but i can find a capacitive touch screen that is small enough to fit in my dash (4th gen camaro) without deleting my radio which isn't going to happen. plus they are expensive. idk y tablets and such are cheaper with the same type screen plus the hardware of the tablet.
Almost! Cept with a Hero!
OP: If you still have the battery, you should be able to find the Amperage listed in mHa near the voltage on the batteries sticker. After you have these 2 values you should be able to construct a small circuit to drop your cars internal voltage down to the appropriate level. Hook it up to the 12v from your car at Ignition/Accessory if you want it on whenever you can use the radio, or to the Constant 12v, after the fusebox, to have it usable whenever your car doesn't need a jump! Best of Luck!
So, I'm actually trying something similar right now except with a HTC Hero with a bloated battery that refuses to hold a charge. I've tried several times to boot the phone with just the USB cable, but all I get is a red battery icon : / I'm looking to just hardwire this stupid thing to a plug or even a 9v alternative. This is gonna be used around my house for various things
As of my posting this, I've found 3 threads on slightly similar topics, none with very good/any info tho. Thank you in advance for any help!
My battery was dead so i wanted to charge it.
But i can't get it to charge anymore and show the charge logo or anything on the display.
I tried normal power button
power button + up or down control key
I had it plugged in now for 5 hours...
Any ideas what it could be?
Sure it ain't your charger? Did you try using different chargers?
Try turning the phone off, then plugging in different chargers while it's off to see if the charging display pops up.
Sent from my LG-D851
valefour said:
Sure it ain't your charger? Did you try using different chargers?
Try turning the phone off, then plugging in different chargers while it's off to see if the charging display pops up.
Sent from my LG-D851
Click to expand...
Click to collapse
The problem is, i don't have the original charger anymore.
Today i tried with the htc charger and a normal usb-cable with iphone adapter.
Both didn't work.
I additionally tried charging on computer (usb) or direct power source.
I will try another charger.
TuikS2 said:
The problem is, i don't have the original charger anymore.
Today i tried with the htc charger and a normal usb-cable with iphone adapter.
Both didn't work.
I additionally tried charging on computer (usb) or direct power source.
I will try another charger.
Click to expand...
Click to collapse
If you have access to a wireless charger, try that. If i remember correctly, it activates a different charging circuit that can help revive a phone when plugging it in won't.
I unfortunately don't have a wireless-Charger
Yesterday i tried with the Nexus 5 Charger. Didn't work either.
The smartphone doesn't even get warmer. So I think it does nothing...
Maybe try to clear the usb port better?
Habe a lookat the USB port, i Gad the case once, that one oft the 4 contacts oft the port peeled off and wasnt able to connect anything. I was able to put it back in its Position using some time and steady Hands and a microscope
Second, for some people it helps to completely disconnect and reconnect the battery.
Sent from my Nexus 4 using XDA Free mobile app
try wireless charging if u can lay your hands on it
if no other option mentioned above works,then try to dissemble your phone using various guides available(@ur own risk)
n try to see manually if your battery is showing a voltage change while charging..
hit thanks if this helps u
Update
Wireless Charging isn't a solution for me.
But!
The Phone did some weird things yesterday.
I plugged it in for several hours.
After one hour, the notification led blinked red a couple of times, then the screen came up with the symbol that it is charging.
Then it went black again.
Unfotunately nothing more possible.
The back was getting warm, so i think the battery was definitely charging.
Any ideas?
Sadly I have moved onto another personal phone, but since I have a plethora of XT897's lying around, I would like to be able to use them for other tasks.
When thinking of various things like hidden GPS tracker for my car or baby monitor for friends, one thing that really gets in the way is the fact that if the phone looses power for ~18 hours (however long the battery last given load), when power is applied again to the USB port, the phone by default stays off.
Does anyone know how to get the phone to automatically power on after the battery has died and it has started to recharge via USB? (Anything short of a 5 minute timer wired to the power button.)
I think I once saw people playing with the bootloader once, not sure if that is the right direction or not.
All my recent toys have been moved over to CM ... would the stock OS have something in the "Hidden Menu" Motorola app for this? Does anyone have info on that app?
I believe powering the device through the 5th pin on the USB will allow it to run without a battery, but I'm yet to try it. This may solve your problem if you hardwire the handset to your car battery etc.
I've often thought about repurposing handsets in this way - built in GPS/dash cam/music centre for a car etc, but without the heat & current draw of charging a battery.
Sent from my XT897 using XDA Free mobile app
schmandroid said:
I believe powering the device through the 5th pin on the USB will allow it to run without a battery, but I'm yet to try it. This may solve your problem if you hardwire the handset to your car battery etc.
Click to expand...
Click to collapse
Not running with an internal battery is an option, but could I get some more details of what you mean by 5th pin on the USB? Whats different than the typical charger with pin 1 at Vcc and pin 5 at Gnd? I try a typical USB charger with no battery in a phone, and I get the green charging light but the phone doesn't come on and won't come on when I hit the power button.
schmandroid said:
I believe powering the device through the 5th pin on the USB will allow it to run without a battery, but I'm yet to try it. This may solve your problem if you hardwire the handset to your car battery etc.
Click to expand...
Click to collapse
I've seen a few things about making an "active cable" by pulling the oddly used pin 4 high as shown:
http://www.atrixforums.com/forum/at...your-own-motorola-factory-cable-schematic.jpg
https://cdn-images.xda-developers.com/direct/8/9/4/9/1/1/FAC_CAB.jpg
Is that what you were thinking of? I need to try to get a hold of a micro cable that has all wires coming through.
crankine3 said:
I've seen a few things about making an "active cable" by pulling the oddly used pin 4 high as shown:
http://www.atrixforums.com/forum/at...your-own-motorola-factory-cable-schematic.jpg
https://cdn-images.xda-developers.com/direct/8/9/4/9/1/1/FAC_CAB.jpg
Is that what you were thinking of? I need to try to get a hold of a micro cable that has all wires coming through.
Click to expand...
Click to collapse
Yeah, that's what I was talking about.
The micro usb cable plugs all have the 'extra' pin in them, but not the wire usually.
A USBOTG cable will either have the wire or the link to the pin.
Alternatively, buy a plug & make it up yourself??
I just haven't got round to testing it all out yet.
Sent from my XT897 using XDA Free mobile app
---------- Post added at 09:33 AM ---------- Previous post was at 09:24 AM ----------
One frustrating thing about car docks etc is that when the phone/battery heats up, it stops charging the battery. This causes the battery to discharge while using GPS etc, so when I get to my destination, I also have a flat battery.
Running without a battery should overcome this. The battery has a temp sensor in it, which stops the charge cycle.
Alternative to the modded USB cable is running a voltage reducer, & hooking it straight to the battery input terminal on the phone. Around 3.6Vdc (3,5-4Vdc) should do it.
Sent from my XT897 using XDA Free mobile app
---------- Post added at 09:34 AM ---------- Previous post was at 09:33 AM ----------
Not useful for a portable handset, but for a built-in device it is ideal.
Sent from my XT897 using XDA Free mobile app
I dunno if this helps you, but if I charge from PC USB port, I can't turn off the phone, it'll just restart by itself. If I charge from wall or car charger, it will stay on or off. Don't quite understand why, but it's quite annoying to charge from pc usb when you're battery is super low as it just constantly reboots itself until it builds up a little charge, but this annoyance may be useful to you.
There are different kinds of USB cables around: the "better" ones have both 0V/5V and data wires, while a few (charge-only) don't use the data wires. The latter type often comes with power banks - it's a tad cheaper... Try to find such a cable, and you'll be fine.
I run a little Xperia mini pro in my car, I went down the route of deleting the chargemon file to get it to power back up if the battery dies as I can't access the hard keys. This has worked fine for me over the past year or so.
This? https://www.youtube.com/watch?v=AM4X8OWlFZ8
I've installed the PureNexus rom, parrotmod and Kernel Adiutor. After I've set the cpu usage to power efficient the tablet started to work really slow (yeah I should have expect that). I had around 2% battery left on my device after all the work I've put in. The tablet turned off like it supposed to, but after I've plugged it in the charging animation didn't show up. I went on holidays so I left it charging, after a full night charge the tablet was warm so I think the battery was full. It wouldn't turn on so I've decided to connect it to a computer with nexus toolbox installed. The computer saw the tablet but it couldn't recognize it. I tried to boot it into fastboot using the toolbox. It didn't work out.
Is there anything I can do?
Thanks in advance.
I'll be back home in around 10 hours so I'll try to force it to work there.
Things to try. Make sure your charging cable is good.
Make sure charger is good, and house plug is working.
Try doing a slow charge by plugging into a PC to charge for an hour or so.
Take back cover off of Nexus, carefully disconnect battery cable from battery, press and release power button, reconnect battery.
Can you see the nexus files if you hook to PC? If so the display might be bad.
Does it power up if plugged in but dies if in plugged? Bad battery.
Sent from my Nexus 7 using Tapatalk
psiphi said:
Things to try. Make sure your charging cable is good.
Make sure charger is good, and house plug is working.
Try doing a slow charge by plugging into a PC to charge for an hour or so.
Take back cover off of Nexus, carefully disconnect battery cable from battery, press and release power button, reconnect battery.
Can you see the nexus files if you hook to PC? If so the display might be bad.
Does it power up if plugged in but dies if in plugged? Bad battery.
Sent from my Nexus 7 using Tapatalk
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Click to collapse
Thanks for answering my question!
I've already managed to fix the issue in a few simple steps:
1. Charged my device for 1 h then tried to turn it on (nothing happened)
2. Again charged it for 2 hours and after that the screen flashed so it gave me some hope
3. After a 12 h charge I was finally able to turn on the device (it had 45% battery)
I think i might have discharged the battery too much.
More than likely the charging port is going bad, and/or the battery. My N7 2012's port is going bad and I have to "adjust" the charger in the port so that it gets a good connection. Then I have to be VERY careful not to bump it or else, it might not charge again. lol