Hello everyone,
If you're unaware, there was a battery recall in 2015 about battery swelling. There was a battery modal and serial number of tablet that was targeted by the recall. Now, my tablet, 6 years after buying it, got a battery swelling problem. Found the battery poping out the back like hell (nearly double the size of the case!) Contacted nvidia support for help and just received today a tracking number for express shipping, a "new" tablet is on the way and no need to return the old one!
Now, yeah, it's an old 2015 tablet, who would be so in joy with that. I myself have many use for my tablet, like a monitoring for my computer, touch portal, home automation.
Now, I opened the back and saw the battery is soldered on the board. Not a big problem. MY question is, can the tablet by used without a battery like always conencted without a battery? I could salvage the tablet with the swallen battery and put it in a wall for home automation. I saw many person doing this but with a battery in it because "it's a built in ups", but having a battery always charging at 100% it's a big fire hasard for whatever device you use. I though about using some root hack to limit power charge to 50% but I never got to that part. Now, with that possibility of having a non battery tablet, that would be awesome.
THanks!
Maybe remove the battery and instead solder on a 4 volt DC power supply... That way you'll have an "eternal" battery and don't have to worry about the actual battery.
No idea if that would work, but maybe worth a shot?
You could always get a 5.5v "supercap" that they use for temporary memory retention and solder that where the battery was.
For example:
https://www.amazon.com/s?k=supercapacitor+5.5v
I'll have to try. I saw some old post where there soldered the red and black on the memory board. That worked but it bypass the usb and I'm using the USB. I'll check for the superap, maybe i'll work. I'll check for temperature at the sametime.
THanks
Related
well, i am new to this forum, basically an electrical Engineer and Master in Electronics, using Mobile since Last 18 years, i am an embede system programmer, dont have enough knowledge about programming Mobile phones, but i think its not that much harder then embeded systems. i have some usefull information on battery and charging your mobile phone.
if your mobile phone takes a long time to charge battery check out for following:
1: is your adopter providing enough current, try to replace the charger or check it with a friend having the same charger.
2: Remove your battery and check battery connections if they are clean ( check both sides ie phone side and and battery pads )
3: Always try to remove your charger from the Mains ( as there is circuitry inside your phone which automatically stops chrging but there are some current and voltage blocking components inside your which may become unstable within time )
4: if you have have USB charger Make sure if both sides fit properly, there must be no loosness in connections.
i recently went into a problem when my htc Desire was not getting charged even after 12 hours, i checked the charger current and voltages.
they were ok, then i just replaced the cable and now it takes max 2 hours for charging.
5: dont let your batteery go below 30%, as it will shorten the battery Life.
6: always check application which you opend but they are running in background, try to force them close, it will prevent your battery from draining fast.
7: Always try to use original charger that comes with your phone. if you think your charger is not proving enough current, and if new original charger is not available, take it to any electronic tech shop and tell them to replace Mains current limiting resistor, as its value increases within time and it passes less current.
8: if charger is broken, and original charger is not available, and if you want it to be repaired, 95% chances are that your charger's safty fuse had gone, you can open it replace it by yourself.
you can open your charger with a flate head screw driver, its normally sealed with low level bond or it may have locks which can be unlocked by screw driver or a small knife.
5 is false. The percentage of battery reported by the device is not actually the percentage of cell capacity left. Discharging a lithium based battery below its critical voltage can cause permanent damage, but even when the device reports 0%, the battery is still above its critical voltage. In fact there is still a gap left between 0% and the critical voltage to account for some discharge when not in use.
6 Properly written android apps should not be using CPU time when running in the background and therefore should only use a marginal amount of power. Not all apps will behave properly as some like to use background data and CPU and you'll notice these apps showing up on the battery usage stats. These are the apps you should FC.
spunker88 said:
5 is false. The percentage of battery reported by the device is not actually the percentage of cell capacity left. Discharging a lithium based battery below its critical voltage can cause permanent damage, but even when the device reports 0%, the battery is still above its critical voltage. In fact there is still a gap left between 0% and the critical voltage to account for some discharge when not in use.
6 Properly written android apps should not be using CPU time when running in the background and therefore should only use a marginal amount of power. Not all apps will behave properly as some like to use background data and CPU and you'll notice these apps showing up on the battery usage stats. These are the apps you should FC.
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I am thank full to your correction, i know what you wrote is true, but what i ment was that what you said, i am taking it as original charge left in battery, not the charge what is shown in phone, i normaly check battery after removing it from the phone with a fully calibrated fluke voltmeter and with a 100 ohm half watt resistor as load and then i calculate the voltage drop across the resistor, i always check my battery on monthly basis, i will take some pics on how to check the batttery out of the phone and will post on this with details.
what i have noticed about application is that the applications that are properly installed through playstore dont use the battery as you wrote, but what i noticed is that when you install cracked application ( not all of them ) they are always running in background, 4 days ago i updated my rom installed all of my favorit application and now my Htc Desire is running for 2 and half day without charging but i do plug the charger when it shows the battery level is 30%. I will appriciate any further information.
Past "cracked" apps being against the T&C of XDA use, "what did you expect from pirated software?"
Further, any charger capable of supplying sufficient current and that supports microSD charging should work. In some cases the OEM charger can't supply sufficient current for full-rate charging.
Posted from my SGS4G, thanks to Team Acid development
jeffsf said:
Past "cracked" apps being against the T&C of XDA use, "what did you expect from pirated software?"
Further, any charger capable of supplying sufficient current and that supports microSD charging should work. In some cases the OEM charger can't supply sufficient current for full-rate charging.
Posted from my SGS4G, thanks to Team Acid development
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You are correct regarding "Cracked" apps.
95% of the chargers other than the original one are not according to the specifications, what is writen out side i.e current and voltages are not correct. Unless you get a good charger made by a good company.
I have checked many chargers available in Market as a replcement. Its my bad habit that i always open things like these before using.
I do open the charger and check,
1: switching transformer build
2: other components like switching Transistor and filter capacitor voltage rating.
3: voltage feed back and stablization when there is load over the charger
4: check switching noise with osciloscope
what i have seen is that most of the chargers are very simple, few third rating components, and simple Zener diode for over voltage protection.
On the other hand Good Chargers have good components, Overload Protection and 2 or 3 level of output voltage protection also good Power To Noise ratio.
2 years ago I had Nokia C7-00, i forgot the its own charger at home, then i tried to charge it with the same specs like oem one, phone hanged its touch screen, i did checked 3 times and each time i connected that charger i faced the same problem.
Anyway i think we should always try to buy good replacement charger mad by a good company.
I normally keep tow or three mobile phones at a time, at the moment i have Nokia, Samsung And Htc, i found original charger always best.
But recently i saw a good looking charger in market " i mean the build was looking good from outside " i got it and opened it in my Lab.
I found good circuit Layout inside. I tried it with my Htc and results were good. But i am still using the OEM, has same specs.
So there are also good things Available in market.
I am curious: Is it real the myth that, if you let your phone to charge even after it "finished" charging will destroy the battery? Or do most of the modern phones have some sort of switch that stops the charging/current?
timotei21 said:
I am curious: Is it real the myth that, if you let your phone to charge even after it "finished" charging will destroy the battery? Or do most of the modern phones have some sort of switch that stops the charging/current?
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If you charge a lithium based battery beyond a certain voltage, it can become permanently damaged, but there is an internal system that regulates this in phones, laptops, etc. I leave my phone on the charger overnight, and haven't ever noticed depleting capacity.
i recently updated google maps from playstore from 6.12 to 6.14, what i have noticed before and now even with new update.
it consumes a lot of battery and never gives accurate location if GPS is turned off and you use only network connection to get coordinats specially while travling.
i think it does not use A-GPS or its always updataing its coordinats through GPS and getting data from the server through network connection.
i tested other applications which do use GPS but dont consume that much of Power.
May be its rendring GPU to consume more power because each time its capturing 10 km radius update when its loading complex maps and updating and using GPU ( Graphic Proccessing Unit ).
Or there is no time intervel reading GPS data.
On the other hand,
i checked GPS with sygic navigation 7 day trial ( sygic stores map data on sd-card and you can use it without a network connection )
during four hours of travel sygic just consumed 60% of battery.
Google Maps consumed 40% of battery in hour.
i think Google must consider this matter.
Phone gets too hot after one hour use.
So using google maps when you are Travling is always better only if you check your Location periodic.
Or use other Navigation systems with stored maps.
But i Like google maps " Thats a big Problem "
.
I had thought that that might be true of lithium batteries nice to confirmation.
I would share this link with you:
Code:
hXXp://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
(replace de X's)
I found it very good.
Oh dear, seems like leaving phone to charge all night long is not that smart...
At the same time, another thing you can do is use the app (Battery Doctor). The app allows for different charging modes, and the last one is a trickle charge which reduces power going to your phone so that it can maintain the liquidity of the electrons which is pretty darn useful and beneficial in the long run.
Funky Games said:
Oh dear, seems like leaving phone to charge all night long is not that smart...
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Why?
Sent from my SGH-T989 using xda premium
lonet0618 said:
Why?
Sent from my SGH-T989 using xda premium
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Well, unless you use a timer on the outlet to stop charging after so long, it's not a great idea because the components in the phone that protect from over-charging can fail - and that can cause everything from battery issues, to melting, to fire.
I view the over-charging protection sort of like an air-bag - it's nice that it's there, but I don't want to rely on it and use it all the time.
Pennycake said:
Well, unless you use a timer on the outlet to stop charging after so long, it's not a great idea because the components in the phone that protect from over-charging can fail - and that can cause everything from battery issues, to melting, to fire.
I view the over-charging protection sort of like an air-bag - it's nice that it's there, but I don't want to rely on it and use it all the time.
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Batteries aren't quite that dangerous nowadays. If you go ahead and open up any phone battery you'll see it has ICs in the battery itself. In reality those are protecting the battery from over and under charging. So you really don't have much to worry about. You can go on digikey and search up hundreds of ICs for this kinda thing. Some of us at ArcDatum also do embedded software research on a bunch of ARM based boards among other things. It frankly not that dangerous to take apart these batteries. The main reason why is that all these phone batteries are actually casings with circuitry and then another case with the battery inside lol.
For reference. The new battery ICs will go to 4.2V but the older ones go to 4.1V (because that's wat the cells used to go to). Also, back in the day, the discharge curves for the batteries dropped off in voltage quicker than the more modern ones. It's also worth noting that leaving your phone plugged in forever won't do anything really other than let the battery discharge a bit then top it off when it drops below a certain point. If you wanted to be super pedantic about it...take a voltmeter and check when it's at like 4.199V lol. Yes going to 4.201V is dangerous. don't do it; the chemistry will hate you.
Hello, i have bought a new battery and it is reporting wrong temperature which is always -7 c or -8 c. I cant leave my battery in wall charger or in phone to charge, because it may overcharge since its showing a wrong temp value and explode or cause a fire. (also it chargers never report it as"charged", always red led on phone and blinks on standalone charger). I think battery has a malfunctioning thermistor, so i talked to seller and he sent me a new one, but this battery has the same problem. Is there a way to fix this? Battery is not oem , it says oem but it doesn't seem like a oem (poor printing and some differences but it has a serial and manufacturing day on it). Can you guys please help me? I don't know if i should return these batteries.
edit: i forgot to state that baterry can be charged with a external charger. Seller let me keep one of the batteries and it is functioning as expected even it has a wrong temperature reading. I suggest that someone with a battery problem should read musicfanat's post.
cizkek_ said:
Hello, i have bought a new battery and it is reporting wrong temperature which is always -7 c or -8 c. I cant leave my battery in wall charger or in phone to charge, because it may overcharge since its showing a wrong temp value and explode or cause a fire. (also it chargers never report it as"charged", always red led on phone and blinks on standalone charger). I think battery has a malfunctioning thermistor, so i talked to seller and he sent me a new one, but this battery has the same problem. Is there a way to fix this? Battery is not oem , it says oem but it doesn't seem like a oem (poor printing and some differences but it has a serial and manufacturing day on it). Can you guys please help me? I don't know if i should return these batteries.
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I've never seen a negative temp in a batterie for our phones but i think i would send them back instead.
faustino_pico said:
I've never seen a negative temp in a batterie for our phones but i think i would send them back instead.
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thank you for your reply, i have already returned one of the batteries . i better change my posts header. the one batery im keeping has no charge problem anymore, i dont know what changed but still temp problem exists, im regularly checking it with my hand :cyclops:
In fact the temperature is used only as protecting parameter - to avoid overheating (which sometimes may lead to fire). The only way used to control charge cycle for li- batteries is voltage - charger should stop at 4.2V. Usually, if the charger circuit is fine it will not let the current be so high to heat the battery to dangerous temp. So if it is the thermistor or some other electronic fault then checking temp with hand is reasonable way to control charging.
The fact the charging process finishes also points that battery itself is more or less OK.
By the way, does it provide similar working time as original battery? Is the charging time also similar?
From the other hand you should understand the risk of using battery with any issues. At least you may put the phone while charging to avoid fire in case something goes wrong. (frying pan is not the most crazy idea )
musicfanat said:
In fact the temperature is used only as protecting parameter - to avoid overheating (which sometimes may lead to fire). The only way used to control charge cycle for li- batteries is voltage - charger should stop at 4.2V. Usually, if the charger circuit is fine it will not let the current be so high to heat the battery to dangerous temp. So if it is the thermistor or some other electronic fault then checking temp with hand is reasonable way to control charging.
The fact the charging process finishes also points that battery itself is more or less OK.
By the way, does it provide similar working time as original battery? Is the charging time also similar?
From the other hand you should understand the risk of using battery with any issues. At least you may put the phone while charging to avoid fire in case something goes wrong. (frying pan is not the most crazy idea )
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It is good to know that it won't effect charging . I am using an external, wall charger for the battery and i haven't noticed any over heat problems in 10 days . It is really weird that i can't charge it with the phone, Also it is lasting really good, a minimum of 6 hours with heavy use (edge connection is always on) and 10 with normal use. I was really afraid that a wrong temparature reading could make the phone unusable.
I know a lot has been posted about the N7 2012 battery problems. There are two major issues that I have been dealing with for well over a year now.
1. It takes 8 + hours for my device to fully charge. depending on how low the battery is.
2. My device will not charge with the screen on. if I play a movie with it plugged in it will not even hold a charge. I use TomTom for GPS & this is extremely frustrating.
It has been documented that the USB port could be the cause of this. I did have the USB assembly replaced once on it back in March of 2014. Also had the mainboard replaced twice in the same time period. Those repairs were due to my device not being recognized by any computer. Even after this series of repairs my device had the same issues.
Has anyone replaced the battery because of a similar issue? I am half tempted to scrap it be Android 5.0 performance suck s for an Asus Zenpad.
Thanks
same issues
jadesse said:
I know a lot has been posted about the N7 2012 battery problems. There are two major issues that I have been dealing with for well over a year now.
1. It takes 8 + hours for my device to fully charge. depending on how low the battery is.
2. My device will not charge with the screen on. if I play a movie with it plugged in it will not even hold a charge. I use TomTom for GPS & this is extremely frustrating.
It has been documented that the USB port could be the cause of this. I did have the USB assembly replaced once on it back in March of 2014. Also had the mainboard replaced twice in the same time period. Those repairs were due to my device not being recognized by any computer. Even after this series of repairs my device had the same issues.
Has anyone replaced the battery because of a similar issue? I am half tempted to scrap it be Android 5.0 performance suck s for an Asus Zenpad.
Thanks
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1. takes long time to charge fully.
2. battery wont charge when using the tab.
but my backup is good as for now...
I am on CM12 Snapshot.
Weak Charger?
I'd recommend, to almost everyone, to pick up a "Charger Doctor" off of eBay for a few bucks. These will give you a readout of the chargers working voltage and amperage. For these tablets a charger should be putting out at least an amp (1000ma) @ 5 Volts during charge. Many chargers are overrated ( these tablets come with a 5V @ 2 amp charger) and it sounds like yours is not putting out enough juice. I seriously doubt that the USB port has anything to do with your problem. My charger doctor has identified dead and weak chargers tons of times. Some chargers I got from China were rated at [email protected] and put out only 100ma! No wonder my phone wasn't charging. I took a picture of the readout and they refunded my money. One of these should help you sort out your problem.
I can definitively say that it is not an issue with the charger or the battery. I just put in a new battery a few minutes ago. My N7 is still charging @ 0.46 Amps. That charge will output 1.2 Amps when connected to me Dell Venue Pro 8. There is definitely something wrong with my N7 just like so many others. So, i will be putting it to rest in favor of an Asus Zenpad here shortly.
I bought a brand new unlocked Moto G4 Play from.Amazon Prime last week. Between purchasing it on Prime and the phone being old and OOP I got a great deal. However, I'm having a couple issues.
The first is with the battery. It charges insanely slow. Yesterday morning I had it plugged in for 3+ hours and it only charged 70%, from 15% to 85%. Also, for a battery rated at 2800mAH, it seems to drain fairly quick. Is it possible that the battery lost some of it's power while sitting around in the Amazon warehouse for so long?
My second issue is with file transfers onto my Mac. This is the third Android phone I've owned and it's the first to.cause my computer to freeze up when connecting it via USB. The charger that came with the phone is just one piece, I.e you can't disconnect the USB cable from the outlet plug. I had rummage around for a USB cable to use. It's an old cable, so I think that's what could be causing my.computer to.freeze. I'm gonna buy a new USB cable today and hopefully it fixes the problem.
Getting back to the battery, is there an app the can analyze my battery? So I can find out if it's defective or just not running at 100%? Any other suggestions on what I can do to remedy this problem would be greatly appreciated.
Thanks,
Adam
As far as apps go you can check the Play Store, and go by rating to see what is best for you. I use this one: https://play.google.com/store/apps/details?id=com.fsinib.batterymonitor
Charging with the stock charger will take hours. It's only rated at like 527 mamps (or whatever it's called), but it will never charge fast. I use a 2 amp quick charger, and from around 20% to 100% it takes just about an hour.
The drain may be because it's new, and getting settled in, so it should get better after a bit of time. Plus it does take a couple charge cycles to reach its full charging potential. I get an easy 5 1/2 to 6 hours screen on time on a full charge.
Now for using a computer I don't have experience with Macs, but I have heard issues with Android and Macs not playing well together. Maybe newer/better cable will help.
I've used 3C Battery Monitor Widget.
Like said above, the charger that comes with it is very low power, you can charge faster with a 1 - 2 amp charger and it won't hurt anything since there is built-in circuitry in the phone to control charging.
When I first got my G4 Play, I charged it up and let it sit unused for about 2 weeks only checking the battery remaining periodically and it still had ~15% left after 2 weeks on standby.
If your battery doesn't get better, you may want to exchange the phone with Amazon before your return is up.
G4 Play XT1607 Battery Drain
I'd like to revive this post real quick. @adam79 did you get your issue figured out?
I bought a phone from eBay. Ok, a bunch of them. I'm buying broken, fixing, and selling. I have hovered around G4 Plays as that is what I learned with and am slightly comfortable with. This new issue has got me stumped though.
Moto G4 Play - listing stated 'will not power on or charge'. No problem, I have extra parts. I tried to plug it in and sure 'nuff, no power. Tried another battery and she fired right up with Marshmallow already reset. I replaced the charging board and it started charging but it was hot. Hotter than normal I thought. Said that it would take 3 hours to fully charge from 71%. Whatever. She wanted the update to 7.1.1 just like the two xt1609s, the other two xt1607s, and my recent xt1601. I let it update then turned it off. Battery was dead the next morning. Plugged it up and no charging animation appeared. Another battery and it fired up. The heat is coming from the metal plate just above the battery contacts. Drains the battery no matter if it's on or off. What could it be?
Info: XT1607 7.1.1 Nougat
Baseband: M8916_20250112.18.05.45.01R harpia_na_cust
Kernal: 3.10.49-g87b323e [email protected] #1
Build: NPIS26.48-43-2
Thanks in advance for any and all help.
I bought my galaxy note 4 in Saudi Arabia and It's been 6 years until my phone fast charging has stopped working. I don't have idea how did it stopped working. I've changed different charger together with different cable but nothing happened. A charger with same output and a cable that holds up to 2.1 A. Nothing happened. So I decided to go to service store and they changed my flexy charge kinda thing. And they said It's probably something wrong with the IC on processor or in the machine. My guess was fast charging doesn't work because the USB port has damaged *probably, so by replacing the USB port will work again. I kinda think that they replaced the sparepart with replica or I could say grade AAA and not with the original (which an average store can't provide such a thing). And yeah I go to an average store which I read on Google review with around 300 people giving 5-4 stars.
And yes I did go to Samsung store first and for some reason they can't fix my phone unless I accept my risk that fixing it will make the phone dead. And it cost higher for like over 50 pound. That cost could get me a new phone lol. Probably because I bought from overseas.
I'm frustrated with this issue regarding with normal charge I had to wait for hours just to charge until full battery. And yet while this battery comes with 3000 mAh, it depleted fast like around 6 hours while using productively. I admit this phone was the best at its generation. To be exact, I charge my phone from 0%-20% around an hour. So to go full battery, I must charge for around 6 hours or let it charge for the night.
My question is:
1. How does fast charging works? Is it really the processor that controls current output? Or somehow just change the flexy charge will make it works again?
2. If somehow I can't stand with this phone, which Samsung phone that actually more reliable and great than my galaxy note 4? (I kinda like Samsung A series, it comes with cheaper price with alot advantages but you guys can give me options)
I assume you already checked that. But just in case. You checked settings->battery->fast cable charging ?
Turn off and on...
And with something like this: https://www.amazon.com/gp/product/B07JYVPLLJ you can check that fast charging works. Should go to higher voltage if it works.
Fast charging can stop working because of the USB cable. I had to change cables a couple of times when fast charging stopped working with them. So I can imagine that USB port can affect it. It is controlled by the processor, which is why some kernels don't have fast charging.
You can replace the USB port on the note 4. It only costs $10 on ebay. But it is not an easy replacement, because you have to separate the screen. I managed to break my screen doing that.
You can also try to buy several replacement batteries for your phone, and an external charger. Then walk around with a replacement battery, and when the battery dies, pop another one in. And charge the old one in the charger. That could also solve your battery problems, because it could be that your battery is old. (and the standard battery on the note 4 is 3220 mAh, not 3000mAh. I saw a video on youtube claiming that fake note 4 came with a 3000 mAh battery)
The best phone to replace the note 4? That's pretty easy to answer - another note 4.
Some people like the note 9 very much. Of course it doesn't have all the features that our note 4 has! The LG V60 also looks nice.
Oh yeah, I also checked the settings and yet nothing happened. Thanks! I'll check that later.
So the fast charging controlled by processor. But is there any possibility by tiny little piece in a processor has damaged and that's why the fast charging has stopped? I did told the service store to change flexy charger as many as possible, but still it's not working. And I told them to replace my usb port on my stock flexy charger, and still it can't do the thing
Sorry I seem misspelled there, my battery comes with 3220 mAh, so my phone is genuine from Samsung.
Thanks for the advice! I somehow found desktop charger that it looks like this, www\amazon\com\Universal-External-Charging-T-Mobile-SmartPhone\dp\B00PC06MJ6 , do you think it will let charge?