Hi everybody.
I want to share how I "revived" my N7000 battery. I didn't find anywhere someone else that did this little thing, and that's why I'm posting here.
If you leave your galaxy Note turned off for a couple of months (it can happen if it is not you main horse any more) the battery goes below 0%. Subsequently if you try to plug it to the power line it gets stuck with the animation of the empty battery with the "loading circle" inside popping on the screen screen every few seconds (I called it dead battery loop but I don't know if this behavior has a proper name). The phone becomes quickly hot while the battery stays cold. I read that someone call this state of the battery as "deep sleep" of the battery controller.
Before buying another battery I tried this and it worked.
Please before actually do this remember that Li-ion batteries tend to catch fire and explode if overcharged or charged with inverted polarity. I am not responsible for damages to people or objects.
Needed material: 2 power cables, 1 power adapter, scissors.
1) take a power cable. Make sure it is NOT CONNECTED TO THE POWER LINE. Cut it near the type B USB port and discard the port.
2) take the cut end of the cable and remove the protective plastic to expose the 4 cables that are inside it. You only need the Red and Black ones so you can cut away the other two.
3) remove the plastic end of the red and black cables to expose the copper parts.
4) Now adjust the ends so you can easily make the red touch the + of the battery and the black the - of the battery at the same time without touching the copper with your hands. MAKE SURE THE TWO CABLES DO NOT TOUCH EACH OTHER WITH THE EXPOSED COPPER END.
5) plug the USB A port of the prepared cable to the power adapter.
6) make the red touch the + and black touch the - of the battery at the same time for 10 seconds. Remember if the battery starts to heat before the end of the 10 seconds STOP IMMEDIATELY and trash it (not in the normal trash but in dedicated ones).
6) unplug the modified cable from the adapter.
7)plug the second cable into the power adapter. Insert the battery into the device and plug the power cable.
8)now the battery should be charging as usual. It is better if you wait until it is completely charged before turning the device on, or at least wait until it is at least 10% charged.
I hope this tip was useful.
I attached the pictures of the modified cable.
Hi here are the pictures.
Related
Slightly long post...
Skip to [Symptoms] if you want to get to the meat!
[Background]
I had a TF701 a while back. After using the HDMI connection in a hotel (I blame this!), the battery was dead in the morning, and the tablet would not boot or charge from the dock. It *would*, however, boot when plugged directly into the charger.
Out of warranty, I eventually scrapped it (wish I hadn't!) and replaced it with a new one...
Move on a year - I bought a second hand TF701 off eBay - this had a broken screen but otherwise worked fine (bit of a bargain!). One replacement screen later, I had a fully functioning TF701 to play with (which I rooted and rommed)...
The other day, the display stopped working (I'd carried it on my bicycle pannier - well padded - but I suspected vibration had done something). Back home it started working again, but the display was a bit intermittent, so I guessed that the connector cable had become unseated, so I opened her up again to take a look.
Sure enough, the ribbon was slightly out, so I straightened it, secured it properly and closed up the tablet while it booted.
Just as I snapped the last clip into place, the tablet instantly powered off and wouldn't boot.
[Symptoms]
Tablet will not boot on battery (plugging into the dock makes no difference)
Pressing/holding the power button results in two flashes of the orange power LED then nothing
Plugging the charging cable into the tablet allows you to boot normally
Unplugging the charging cable results in instant power down
Once booted (on external power), the tablet functions normally, but claims that the battery is at 0%, claims it is charging, but the battery doesn't actually charge at all.
The symptoms above were exactly what my 'scrapped' tablet did, so I thought this was yet another dead TF701. The difference, this time, was that it was working fine right up to the point where the last case clip was snapped into place. In other words, I seriously doubted that this was an electrical failure.
[Resolution]
I'm not entirely clear on what resulted in fixing the problem, but here is what I did:
disconnected the display and digitizer ribbon connectors
reconnected the display ribbon only (i.e. not the digitizer) and tested (no change)
disconnected the battery connection
measured the voltages on each of the pins on the battery connector (roughly 4v on the live pins)
cried inside a little
carefully reconnected the battery connection (firmly!)
reconnected the display and digitizer connections
tried powering her on again (expecting nothing) - she fired into life!
I let her boot up while the display panel was not clipped in place - just resting on the tablet. The TF701 booted up normally, and the battery display showed that there was about 87% charge!
This time I shut it down, clipped the casing back together, and powered it all up again - she lives!
So far, the tablet seems to be working normally, docking/undocking is fine and the battery charges normally.
I suspect that the two flashes of the power LED is some sort of diagnostics signal (may be as simple as 'no battery detected').
Bottom line is that if anyone else out there finds their tablet with the same symptoms, open her up and try re-seating the display ribbon connectors and the battery connection. There is hope!
I'm now wishing I hadn't been so quick to dispose of the first one that died. Oh well.
My nook HD ha been sitting for a few months, and worked fine. Then the charger broke. I stuffed it in a box. Then recently realized i had enough money to pick up a third party charging cable that had decent amazon reviews.
Ten seconds charging: Five seconds with green, five seconds amber, then click.
I hold the power button and nothing.
Unscrew the tablet and battery's seated. Plug power in without a battery attached just for funsies. Red light after a fw seconds of rapid amber/green flashing.
Is there any way to revive this dead unit short of buying another battery? I halfway don't want to given the nook's charging cable design seems almost intended to fail with snapped wires. I just want to see if I can revive this thing or try pulling it apart to see if I can repurpose the screen or not.
Goggles2114 said:
My nook HD ha been sitting for a few months, and worked fine. Then the charger broke. I stuffed it in a box. Then recently realized i had enough money to pick up a third party charging cable that had decent amazon reviews.
Ten seconds charging: Five seconds with green, five seconds amber, then click.
I hold the power button and nothing.
Unscrew the tablet and battery's seated. Plug power in without a battery attached just for funsies. Red light after a fw seconds of rapid amber/green flashing.
Is there any way to revive this dead unit short of buying another battery? I halfway don't want to given the nook's charging cable design seems almost intended to fail with snapped wires. I just want to see if I can revive this thing or try pulling it apart to see if I can repurpose the screen or not.
Click to expand...
Click to collapse
I had to double check this wasn't a post I done a few months ago and forgot about...
I lost my charger, foolishly tried to force a regular 30 pin in before realising it had a proprietary port and bought one online that acted exactly like yours. Assumed it was due to me forcing the 30 pin in but maybe not!
Anyway, the solution for me has been to apply a bit more pressure when putting it in. So I'd insert it into the port until it felt comfortably in place and then just give it a little bit more of a push in than seems reasonable. In general after doing that I've had no issues for the duration where it's connected (I seem to recall it disconnecting once or twice afterwards a bit easily but not a common thing), it's not the most scientific of solutions but it has worked every time for me.
Hi,
A little bit of background:
I had previously converted my original nexus tablet into a clock. I followed a guide on YouTube by cutting the wires from the battery. Then, just connecting the red wires from the battery to a spliced up micro USB cable (red wires). Trimming all other wires. Cut a hole at the back of the case so that the USB port can pass through and connecting straight to the USB charger. The modified clock has been running steadily for more than 5 years now. Aside from power failures which I need to turn it on and turn on the clock app back, no other issues. The battery indicator is 0%, but charging. Direct power, no battery in tablet.
So I thought the same technique would work for the galaxy tab s 8.4. Did the same like the nexus tablet. It kind of work, until I noticed the battery is draining. It starts at full charge (100%), then it will slowly drain to 0% and the battery will die. At first I thought I did a bad job at soldering or connnecting the wires, but after a week of trial and error, I finally found the problem. With the tab s, direct connection does not work. The battery appears full, then slowly charges down. The tablet does not detect a charge, even when it is actually connected to the wall.
Does anyone know how to fix this problem?
One method I did think was rewiring the battery csbles so that it loops to itself. Red to red, black to black, without the spliced micro USB cable. Then power will come directly from the micro USB port. I noticed that if I connect the charger to the port, there is a charge. But since I have two power sources going to the tablet, connecting through USB port will cause the tablet to turn off. Maybe overload or something.
I don't think removing the battery connection and just using the micro USB port port for direct power supply will solve the problem as I did try to just connect it while removing the power source which is attached directly to the battery. It did register a charge, but it can't turn on.
Thanks.
You may be able to fix this with a resistor, but I really don't know much about that at all.
I know you can make a "download mode" cable, to get certain devices into download mode...
Here's another - .
I know this phone is old and a new one has been ordered, but I just want to get some pictures off of it before it becomes trash. I can only get it to turn on to the logo screen and then it goes off. It won't charge, but will show the led from time to time blinking red and the battery icon on the screen and then it disappears. I can get to the bootloader screen, but it's locked so I can't do anything. Any suggestions/help? Please?!
Noobalicious said:
I know this phone is old and a new one has been ordered, but I just want to get some pictures off of it before it becomes trash. I can only get it to turn on to the logo screen and then it goes off. It won't charge, but will show the led from time to time blinking red and the battery icon on the screen and then it disappears. I can get to the bootloader screen, but it's locked so I can't do anything. Any suggestions/help? Please?!
Click to expand...
Click to collapse
It's not clear to me exactly what your issue is (don't have 1+) but does sound like charging issue, might just be usb connector (damaged/dirty) or more problematicly the battery or battery charging circuitry. A usb connector with debris in should be easier fix.
If you have some electrical knowledge (or take to repair shop & they can do it) you should be able to overcome phone not charging by opening phone up to either charge battery via accessing back of usb connector/pcb/pwb or connect another battery. (Be careful playing with electricity & charges )
Note: if the battery has been run down too far by you keep turning it on then the battery will not charge normally again as it needs some residual charge in it to become charged (ie when your phone shows zero charge really the battery retains a few % otherwise it's impossible to recharge, though a special charger can supply a high charge initially to bring them back to life sometimes, but you probably need a battery specialist for that, so much easier to swap battery)
if it's soft brick then that is a whole different story.
I'm not electrically inclined, so I'll likely take it to a local shop. Thanks for your response.
Hi all, i have a sm-t311 that i have left turned off for at least 6 months, because i buy a new tab. I want to turn it on, but it won't.... I checked something and i can tell you:
Battery is charged. I tried with multimeter, and i get 3.7v, and also connecting a lamp to the battery, the lamp turn on.
battery vontacts seems to be ok. I removed the back cover to check if something is break, but everything seems to be ok.
I just rooted it a lot of time ago, like 2 years ago, and always worked.
I have check battery charging with a milliamps absorber tester, and nothing can charge the battery more. I tried with a powerbank, with original power supply and cable, and pc, i get 0.14 mA for 10 sec, then drop to 0. even unplugging battery and connecting charger i get the same thing, and even pressing the power button (with and without battery inserted).
I tried also unplug every single flat cable to the mainboard except the power button, microsd and display, but nothing happen....
The day i left the tab into the bedside table, was working at 100% of functionality. I don't know what happen now. The only thing i can imagine, is the battery left acid on the backside of the mainboard, and brake some contacts....
What i can do?