Database Users

Discharged battery with flash light bulb. Problems, plzHelp

Well I read this BIG 5 page post on how the Universal shuts down at 30+-% and mine has just done that after owning it for about 8 months.. I read someone discharged the lith-ion battery with a flash light bulb. I did the same @3.6volts and the battery went to ZERO. Now when I plug it in the wall charger it resets over and over without completely booting up and self charging (at the imate welcome screen). Also If I plug it into the usb to charge it just flashes red light rapidly kinda like a 4way stop light but slightly faster. Did I screw up the battery? Did a hard reset with no luck too.

update:
Well there are four connector plates on the battery and I only discharged two of the main plates. Forget the two little plates also have cells and needs discharging.. I crossed them somehow with paper clips and for some reason I got voltage again on all cells! So the unit is back to SUB normal (turning off at 40%-+, sucks!) Time to trial a new battery!

wow you almost killed your battery
first by discharging it to zero (you meant 0 volts?!?! don't allow it to go below 3 volts!)
then shorting it.. (if i interpreted your desc properly)
:shock:

Strange touch screen feeling while AC charging (static charge or something else)

I noticed since last week that when i put to charge my HD2 with its AC power supply, there is a strange effect on the touch screen:
if it is charging on a table, and i touch only the display and drag, it feels as if the display has an invisible grid, or some kind of static charge, draging with my finger is strange. while if i hold it with my other hand this effect disappears. With USB charging this doesn't occur.
Is it normal? am i having a problem?
I got my HD2 a couple of weeks ago, and most of the time i charge with the usb cable connected to the computer, but once in a while i also need to charge with AC power supply.

Mayby your HD2 is possessed by the electric monster or something!
No, well try cleaning your Hd2's screen with a different cleaner. Note: I do actually know what you are talking about I fell it now. I think its farly normal and goes mostly unnoticed.

Slicerwolf said:
Mayby your HD2 is possessed by the electric monster or something!
No, well try cleaning your Hd2's screen with a different cleaner. Note: I do actually know what you are talking about I fell it now. I think its farly normal and goes mostly unnoticed.
Click to expand...
Click to collapse
Yes, if it's charging alone or if i hold it with both hand i don't notice anything, but using it on the table, or holding it with two fingers by the rubber borders (leaving it ungrounded by my body) i will have this strange feeling, discharging some static though the touch display

Yeah bro. i feel it too at times

The cause could be you, your footwear (socks, and/or shoes), the carpet causing a static build up or just simply a voltage difference between the table and the power supply earthing.
The power supply unit will have an isolated charge, where as the computer will have a grounded connection.
As long as you don't get a shock or the phone doesn't get an electrical discharge, then I wouldn't bother about it.

Run your finger tip across the battery cover when on ac, same feeling but bigger

This is caused by the charger current leak to ground. Since the charger isn't grounded, this leak current goes through your body when you touch any conductive parts on your HD2, or even it's screen.
This current leak should be limited by safety standards, and should do no harm neither to you nor the device, but, you know, faulty chargers happen, so if you touch the thing and it causes you to take you hand off with an uncontrollable "OUCH " cry, don't think twice before replacing that charger
Note that the "effect" is going to be much stronger if you are touching a grounded surface with your naked skin, for example, standing on a wet floor barefoot, or holding a water pipe with another hand. The "wet" part gives it so much more conductance, it actually becomes a lot more dangerous when the equipment is faulty. This is one of the reasons why it is usually recommended to never operate anything electrical when you are wet.

faulty/not properly grounded charger
fred_up said:
The cause could be you, your footwear (socks, and/or shoes), the carpet causing a static build up or just simply a voltage difference between the table and the power supply earthing.
The power supply unit will have an isolated charge, where as the computer will have a grounded connection.
As long as you don't get a shock or the phone doesn't get an electrical discharge, then I wouldn't bother about it.
Click to expand...
Click to collapse
not really...
it's just a faulty (not grounded) charger - having the same issue with mine although not on the screen but touching the back cover is really unconfortable.

Notification LED constant green

1. After changing the USB Charging Flex Ribbon, the notification LED lights constantly green after switching on.
2. My battery drain is also dramatic (max. 7 h before empty). I guess thats another problem though (Android OS/System).
3. The Phone is only charging with USB power, though its connected to different chargers which deliver up to 2A.
I had to change the Flex Ribbon, because the microphone stopped working after getting a hot tee shower. Though the micro is still barely usable because one can understand me very bad.
Is it possible to change only the microphone?
Thanks for any tips.
PS: Im using CM 11 (updating nearly every day)

It could be a faulty part, but water damage causes weird stuff like that too..
Open it up and check your connections, and also inspect the board for any sediment or corrosion deposits. It might be what's causing the short that's keeping your LED on and the USB only accepting a single form of charging. If you find some, clean it with a little isopropyl.

[Q] Battery Mainboard Solder

So there's lots of questions about bad battery life but haven't found my issue in searches - altho I suspect my issue is a factor for many to some degree.
N4 took a 4' to drop to concrete. Screen cracked. Replaced screen w/no problems. Ran fine for a while on stock 4.4.4. Lollipop comes OTA practically zero day and since the N4 isn't my primary phone I upgrade to play around. Shortly after 5.0, the battery drains and shuts the phone off. I charge it overnight, pull it off, battery is dead, phone shuts down. Will stay on and operate fine on wireless charger but powers down if not connected. Pop off the back again to make sure battery connector is snug and reassemble. Now I've got red light of death. Get Google logo and can boot to recovery options but it just cycles. Disassemble again and ultimately find that the battery pins from the mainboard and their little black housing have come off at some point. Try to solder it back on but there's chips on the back side and there's just no room to get the solder on and pins reconnected. Not w/my skills anyway.
My main question is, has anyone successfully reconnected that annoying mofo? Thinking about skipping the connectors and just soldering wire straight from the battery to the board. I don't see anything in that connector that would be a problem if absent, but any warnings I should know about? Other workarounds?
This is not mission critical, just principle/spite.

Repaired?
gkmocv said:
So there's lots of questions about bad battery life but haven't found my issue in searches - altho I suspect my issue is a factor for many to some degree.
N4 took a 4' to drop to concrete. Screen cracked. Replaced screen w/no problems. Ran fine for a while on stock 4.4.4. Lollipop comes OTA practically zero day and since the N4 isn't my primary phone I upgrade to play around. Shortly after 5.0, the battery drains and shuts the phone off. I charge it overnight, pull it off, battery is dead, phone shuts down. Will stay on and operate fine on wireless charger but powers down if not connected. Pop off the back again to make sure battery connector is snug and reassemble. Now I've got red light of death. Get Google logo and can boot to recovery options but it just cycles. Disassemble again and ultimately find that the battery pins from the mainboard and their little black housing have come off at some point. Try to solder it back on but there's chips on the back side and there's just no room to get the solder on and pins reconnected. Not w/my skills anyway.
My main question is, has anyone successfully reconnected that annoying mofo? Thinking about skipping the connectors and just soldering wire straight from the battery to the board. I don't see anything in that connector that would be a problem if absent, but any warnings I should know about? Other workarounds?
This is not mission critical, just principle/spite.
Click to expand...
Click to collapse
So were you ever able to get the connector solder back on? I think mine break because it was to hot when I was removing the battery. My nexus 4 shutdown on me, my battery was expanded. I was wondering why my screen was being pushed out. I wonder if Android 5.0.1 is causing phone to run to hot. Never did this with Android 4.4.4. Hope the connector can be fixed. Maybe I take it to a solder shop.

jameswhite4684 said:
So were you ever able to get the connector solder back on? I think mine break because it was to hot when I was removing the battery. My nexus 4 shutdown on me, my battery was expanded. I was wondering why my screen was being pushed out. I wonder if Android 5.0.1 is causing phone to run to hot. Never did this with Android 4.4.4. Hope the connector can be fixed. Maybe I take it to a solder shop.
Click to expand...
Click to collapse
Not yet. I pulled the connector back off and cleaned everything up. I found that even very small gauge solder is too sloppy for the 4 small connections. Not to mention there's chips on the back side so you can't linger too long with heat. So my plan is to try again with some conductive ink and/or gel. If that doesn't work I'm just going to use wires to bridge the battery right to the board. Haven't had time to work on it but I'll follow up here when I do.
Did you get a replacement battery? Lithium batteries can swell because of overcharging. There are definitely more than a few N4 owners who had the same issue. A replacement battery won't solve that problem but it could be more tolerant of it, for a while - and depending on if it was "user error" or a fault in the phone's overcharging protection circuitry. Don't go to the trouble of having someone solder the connector back on with the old battery.

Is the vibration motor supposed to be soldered to the motherboard?

Hi,
Please can anyone tell me whether the little connector on the vibration motor is supposed to be soldered to the motherboard or does it just touch at a certain place?
I've already posted another thread about having replaced the battery but it doesn't seem to charge.
Without going into details all over again, a local repair shop replaced the charging port last week - my phone was returned in seemingly working order but they had assured me a bulging battery was OK. I charged my phone but the battery was draining quickly, which was what led me to research a bit more and discovered how dangerous it can be so I ordered a new one.
In the process of fitting the new battery, I discovered half the screws in my phone missing, no copper tape, plus there is no black rubber cover over the charging port & vibration motor as is shown on the guide for replacing the battery on the fixit.com website.
So I'm wondering if the small square 'connecctor' (?) part of the vibration motor ought to be soldered to the motherboard or is it just normally held in place by the black rubber cover? In my phone now, the 'connector' doesn't stay touching motherboard so I'm not sure if this would affect the phone and stop it from functioning or would it just mean the vibration wouldn't work?
Would this affect whether the battery could charge or not?
(Incidentally, I discovered that the the battery connector was upside down compared to the pictures in the ifixit.com guide (the red wire was nearest to the battery instead of the black wire being nearest) so I was hopeful that by correcting it to match the picture, I would have solved the problem but unfortunately, it didn't make any difference. When I connect a wall charger, the screen just flashes and when I connect it to my laptop, it just gets a blinking white led but nothing more. It seems strange to me that it wouldn't make a difference - is it like a usb-c cable in that it can go either way round?)
The battery seller asked for photos of the new battery in my phone and has now offered to replace it - is this likely to make a difference or is the vibration motor not being attached to the motherboard the cause of the problem?
I'll be so grateful for some help.