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Scumbag charger: says it's charging.... discharges your battery.

Check out what a faulty USB cable does to your phone overnight.
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Sent from my SPH-D700 using XDA App

My faulty charger caught on fire while I was sleeping
Sent from my SPH-D700 using XDA Premium App

masaidjet said:
My faulty charger caught on fire while I was sleeping
Sent from my SPH-D700 using XDA Premium App
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Damn ...
http://troll.me/images/thumbs-up-jesus-says/that-****-cray-that-****-cray.jpg

Blankrubber said:
Check out what a faulty USB cable does to your phone overnight.
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Heh that's pretty bad.. My only problem has been battery drain while running GPS and Pandora simultaneously in the car. The phone is capable of pulling more than 700mA when you utilize all of the hardware, so there is no way to keep a net positive charge current. Also when the battery gets too hot (above 45°C, I believe), the phone will stop charging to prevent the battery from exploding

Geez what kind of USB cables do you guys use? I dont even use the stock cable that Samsung gave me, i got a blackberry one. Works great. Rim isnt dead yet lol

Valorous17 said:
Geez what kind of USB cables do you guys use? I dont even use the stock cable that Samsung gave me, i got a blackberry one. Works great. Rim isnt dead yet lol
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I use the cheap long cables from Monoprice.. or the stock cable, or whatever I have laying around. I throw out the cables when they get flaky -- but my problem wasn't related to the cable like OP's was.

iSaint said:
Damn ...
http://troll.me/images/thumbs-up-jesus-says/that-****-cray-that-****-cray.jpg
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Lmfao
Sent from my SPH-D700 using XDA Premium App

christophocles said:
Heh that's pretty bad.. My only problem has been battery drain while running GPS and Pandora simultaneously in the car. The phone is capable of pulling more than 700mA when you utilize all of the hardware, so there is no way to keep a net positive charge current. Also when the battery gets too hot (above 45°C, I believe), the phone will stop charging to prevent the battery from exploding
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I had the same problem charging in car. if using usb to charge it charges at 300mah but a/c charges at 600mah. so if you are using usb and have an extra cable you can short the green and white wires(going to phone) and this will trick it into thinking its on a/c. have not had any problems since doing this. i can go on a 6 hour drive with gps and music streaming and still arive fully charged.

I would like to see pictures if you have some.

I've seen this symptom with a bad flash. Something was using a ton of charge. More than my charger could put out. Hence, battery drain when plugged in.

gastricpenguin said:
I would like to see pictures if you have some.
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i do not have pictures. i use heat shrink on my wires so i cant take apart to get any but if i can find another cable i will modify it and take some. it is a simple modification. just carefully cut the black casing from around wires(anywhere along cable, remove about 2 inches) without cutting wires inside. you should have 4 wires(black ground, red 5v+, white data -, green data +) cut the white and green wires then splice them together(the ends going to phone) seal it back up and your good to go. this is just simulating plugging into your a/c adapter. all the adapter is doing is converting a/c to 5v d/c and shorting data wires to tell phone its plugged into wall. usb is already running at 5v d/c so you just have to provide your own way of shorting data. you can ohm out your cable if you like to verify. 4 pins on conector 2 center ones are for data. they are open until you plug into a/c adapter at which point you will get short.

The cable did the same thing on my girlfriend's phone, too. Phone thinks it's charging, therefor no deep sleep, and it just discharges. It may be the cable/charger combo, thogh, but I KNOW the cable is certainly fault; I tried it with other chargers.
Sent from my SPH-D700 using XDA App

I actually had the charger port on my phone stop working, but Android still showed it was charging. I tried multiple combinations of cords and chargers, only to take it into Sprint for a replacement.
When it first started, it only seemed to happen on certain cords and in certain positions, but eventually, it stopped charging altogether.

VassagoX said:
I actually had the charger port on my phone stop working, but Android still showed it was charging. I tried multiple combinations of cords and chargers, only to take it into Sprint for a replacement.
When it first started, it only seemed to happen on certain cords and in certain positions, but eventually, it stopped charging altogether.
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Hmm, this seems to be happening to my girlfriend's HTC Evo. Did you have the Sprint insurance? And was the phone still under warranty?

My samsung cable failed within the 1st month. Its really the worst cable ever made on this planet.

DIY Battery pack for Iconia Tablets

Most of the guys here at XDA are familiar with the hardware components inside Iconia tablets as well as very fond of all hardware weaknesses and strengths of that particular device.
As no surprise its battery capacity is …I would say, insufficient for that kind of a portable device especially given what brilliant job the engineers from apple had been done to Ipads.
Anyway, let’s move on the subject of this post.
The original battery has the specs as follows: 7.4V ,3260mAh .
My experience was quite straight forward – 3.5 hours video playback (display 60% dimmed down) ,4.5 hours wifi browsing/downloading , after 8 hours in stand by ( Wifi ,GPS turned off) battery drained about 25 percent .
That’s very close to a regular notebook and is not exactly what I expected from a 3G / Wifi tablet.
The good news is that not only Acer’s devices are paired with short lasting batteries, so no one should regret choosing Iconia tab, and even better news is about to come soon if we can craft our own supporting battery and make this gadget work overnight .
The battery charger is providing current of 12V 1.5A (1500mAh) and 12V is happen to be one of the most popular voltage used in cars and therefore wide range of cars accessories as well as security cameras and so forth. A brief eBay search led me to a Chinese made super duper battery for security cameras which may be my happy ticket. 12V 9800mAh sounds like a spoon of honey to me. Of course the battery pack looks horrible (OEM cells, blue PVC insulating tape) but it cost less than you might think.
If paired with fancy spiral cable and appropriate DC jack this 350g battery may fit comfortably in your leather belt pouch and feed your lovely monster tab for about 6 + hours
The real power consumption of the tab is about 3260mah / ~3.5h = 800-1000 mA
After simple math we may see that battery with 9800mAh may charge the tab for about 6.5 hours
So my way of thinking is with fully charged internal and external batteries we have about 3.5 hours internal capacity then charge for about 1.5 hours (totally 5 hours ) then another 3.5 hours on internal battery then charge 1.5 hours and so forth until the supporting battery pack is almost drained. If the math in the following chart is correct we may recharge the internal battery up to 4 times without being chained to the wall socket
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So my hope posting this thread is that someone might like to join me in this experiment and share the results. I’m not an electrician and perhaps I may be wrong about my expecting results but if so, I’d like to be advised by someone who knows more than me and would like to put his/her contribution to get this mission complete

Uh. You didn't post a single question, what do you expect? Someone to confirm that yes, the external battery can be used to charge the tablet once you make a proper cable for it?
Yes, it can be used for that. And yes, it'll provide several hours of extra mileage.

It's the general section, no question required. Its a discussion, get over yourself.
Edit, I see it weighs 300 grams, pretty light. Do you have a link?
Sent from my Acer Iconia A500 using Tapatalk

I think it's a pretty sound idea. My question would be, how do you charge the external battery pack?
Most devices have an internal voltage regulator, that shuts the connection when a battery is sufficiently charged to prevent over-charging. Without this little device, you could overcharge your extra battery and possibly explode it.
Charging units (comes with the tab) only convert from AC to DC, not regulate the cut-off supply, at least as far as I know. So you would have to devise a method to supply the correct amperage and voltage, and, shut off when charged.

I got one of these external battery packs. I keep it in my backpack, and it'll recharge my tablet and phone several times over.

heldc said:
I got one of these external battery packs. I keep it in my backpack, and it'll recharge my tablet and phone several times over.
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Question, what do you use to re-charge the external battery pack?
Inquiring minds wanna know.....
EDIT, just checked the link. Too bad there's no NewEgg in Moscow, but lots of chinese batteries!!!

It comes with a charger, you plug it into the wall, or your solar panel, or your car.

heldc said:
I got one of these external battery packs. I keep it in my backpack, and it'll recharge my tablet and phone several times over.
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Thanks! I will save that and order one soon, as I am looking to do a prolonged photo shoot with my tablet in "follow-mode" displaying the shots as I take them, and was looking for a reliable way to keep it juiced.

Wireless charging issues?

I purchased a charger from a local company here in Australia. We really don't have much option over here as most companies won't ship to here. They tested them out and they worked (I trust the company as I know one of the owners).
Problem is that it mostly only charges to around 88% and peaked out here and stays attempting to charge, but not charging just getting hotter and hotter. So far max was 58deg I think. It has charged to 100% twice only, and I have had them for 2 weeks. These 2 times it perfectly charged to 100,stopped charging and cooled down.. Perfect.
A few others have had issues as well but the suppliers say it works fine for them.
Has anyone had any issues at all like this using wireless charging? We are really trying to get to the bottom of this and trying to figure out if it's a phone issue or a charger issue.
I have tried it with any and all stock and custom roms, both totally clean and with apps installed.
I have attached my battery graphs here in case that helps solve the problem.
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We noticed there was quite a few bad remarks about the lg one on Amazon so thought I would ask here.
So, anyone else have issues with inconsistent wireless charging of nexus 4?
Thanks.
Sent from my Nexus 4 using Tapatalk 2

I'm having the same issues as well with this Wireless Charger I purchased off eBay: http://www.ebay.co.uk/itm/221166419716
For the first 2 weeks it was charging without issue. Charged the phone up to 98/99% and then switched on and off to maintain that charge, and the phone did not get very hot.
For the past few days it has only been able to charge up to 90% and will not go any higher, but the phone gets very hot and stays like that (45C). Plugging the phone into a USB charger gets it up to 100% so it can't be that the battery maximum has been reached.
Would be interested to know what type of Qi Charger you have to see if it's a problem with a certain 'type'.

Mine isn't that one. It's no brand at all. The guys who imported them tell me they tested some, including that you bought and they say that one was intermittent.
I recently purchased http://www.fasttech.com/products/1154/10001946/1142301 and this works perfectly so far... But then it's only been a couple days...
I am putting it down to a hardware revision 10 issue where it is not perfectly qi compliant. The newer ones are supposedly rev 12 which are qi compliant.... And hopefully they work fine with it so I can sell them to my friends who all bought an n4 today (5 at work in a smallish Xray dept)...
Sent from my Nexus 7 using Tapatalk HD

Is this the hardware revision on the phone, or do you mean the rev of the charging device?
As mine evidenced, even if it works perfectly for a while, it could still not be an indication that the qi charging will keep working.
I'll probably just stick with my one until the 'official' one is released. Was a little worried that the temperature staying around 45C for extended periods of time could have a negative effect on the battery or phone components however.

Kind of a necro post but my N4 on the official charger will top out at 88% as well sometimes, then flap between charging and discharging like the phone thinks its full and is trickle charging. If I plug it in and get it to 90%, then go back to the orb, it goes to 100% just fine.
Sent from my SCH-I605 using Tapatalk 4

Double necro but I have this exact same issue and can't seem to get it to work. Anyone figured it out?

Same issue with Nokia DT-900
Nexus 4 charges to 70% and then "trickle charges", turning on and off.

jholl016 said:
Nexus 4 charges to 70% and then "trickle charges", turning on and off.
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After a few months, mine would do the same thing. For some reason the "efficiency" of the N4 charging circuit (inside the phone) became somehow worse.
The DT-900 uses a TI bq500410A chip for control of the charging. If it detects too low of efficiency it will cut off. Luckily it's possible to modify this threshold. By removing the resistor connected to pin 43 of the TI chip it allows it to charge regardless of efficiency. It still has temperature protection so I don't think there is any danger.
http://www.ti.com/lit/ds/slusb96/slusb96.pdf

presslab said:
After a few months, mine would do the same thing. For some reason the "efficiency" of the N4 charging circuit (inside the phone) became somehow worse.
The DT-900 uses a TI bq500410A chip for control of the charging. If it detects too low of efficiency it will cut off. Luckily it's possible to modify this threshold. By removing the resistor connected to pin 43 of the TI chip it allows it to charge regardless of efficiency. It still has temperature protection so I don't think there is any danger.
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Well, that type of mod is waaay over my head, but at least that answers the question. Thanks!

Just to add some information to this thread, I have the new Google Wireless Charger and it does the same thing. It charges to 80% and then just plateaus there, getting quite warm, but not hot, to the touch. Strange.

Modify stock battery of a phone for extra mAh by add one or more batteries

Hi all hardware mod experts/hobbyists.
As we are all moderate to heavy phone users, we need a phone with a good battery life that won't die before evening. However, everyone seems stick to a hone that could work with screen on less than 6hrs, even 3000mah won't help much.
Now, I want to add 1 or 2 more batteries connect in parallel to my current stock batteries. I hope it would multiply the juice, however I would concern about Charging Voltage, safety charging current from Charging IC inside the phone, and Charging Duration. Of cause, adding extra battery will make your phone Fat, ugly and heavy but we have better battery life.
battery type : norminal voltage of Li-ion 3.6v or 3.7v, Li-Po 3.8v and some other battery even mention 3.9v or 4.0v .
Full charge :4.2v.
Charge voltage 4.2v
Current : depend on the phone
duration = capacity / current
Please upload your modified phone by add extra batteries, with your usage experience.

i found this for iPod Touch 6th Gen. He modified by soldered another battery on the back for tripple battery life

I think it is better to use a power bank, safe, easy,maybe not convenient

wangyf5039 said:
I think it is better to use a power bank, safe, easy,maybe not convenient
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Yep.... It is better to use power bank.... To embed 2 or more batteries may give better time but looks too odd...
???

I'd recommend to if you're gonna add another battery do it with another of the same type because phone Power Manangment IC could have troubles trying to read two or three, if wanted, different batteries, in some cases they have different data read pins(the ones that are not positive and negatives)
Sent from my XT1058 using XDA Free mobile app

If connecting batteries, they should be same voltage and amperage. To get longer run times at the same voltage you connect both positive together, and both negatives together. If they are the same, lets say 3000 mah, then you while get 6000mah. Approximately twice the run time. If one battery is 1500mah, and the other is 3000mah, then you will only get 3000mah when they are connected. They will both only charge to 1500mah, or the lower amperage. If you connect the batteries from one positive to the other negative, on a 3.2 volt battery, then you will double the voltage to 6.4volts and blow out circuits on your device. Personally, I carry solar charged battery packs. I also have an AGM battery for a lawnmower that is 300amps, which will charge my phone for weeks. Any questions feel free to ask. I was a yacht mechanic, so I had to install and fix DC and AC portable power systems.

You better try some software optimization to get a better battery life,like a custom ROM & kernel, root your device,a good app for battery & performance boost which personaly use is called greenfy and it realy improves the battery life by hibernating apps,anyway 3000 mAh should be enough for most phones and better you lose your warranty rooting it,not trying to burn your phone's circuits with other batteries

Hi ! got 5000mah battery installed on my OP3, but it still says OP_3000mah.. How to modify this? Does this need to be rooted? Thanks!

Hi,
I recently did this to a Samsung Galaxy A3 2016 that I had multiple units of. One had a good screen and a battery, but the board was dead. The other one had a dead LCD and no battery. I turned them into one.
All you need to do is make sure that the voltage of the batteries is about the same, and then just solder the + of the first one to the + of the second one and the - of the first one to the - of the second one. Make sure to solder it to the pins beyond the battery controller, so that the second battery doesn't overheat or expand. Then just insert/solder the whole thing into the phone. DON'T use cells without a charge controller.
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This is what I did with the housing afterwards. I screwed 2 separate frames together, which allowed me to house the second battery with no problem. No glue was used and this is very solid.
The pictures are old, I later put a camera lens on it and a new back. I also got a separate NFC antenna, which I stuck on the top battery since the original antenna is on the bottom one.
I hope this helps.

And as for the battery capacity being displayed in the phone, I'm sure most applications such as AccuBattery or Ampere just display the capacity according to the model of the phone. I know that phones CAN measure the voltage of the battery (or batteries in our case), but I'm not entirely sure about phones being able to measure the capacity of the battery on their own. I know my modded phone displays 2300mAh despite the actual capacity being around 4400mAh after the mod.

Charging speed

To power up, you consume Red Bull. But your phone just needs its adaptive fast charger. Rate this thread to express how quickly the Samsung Galaxy A7 (2018) can charge. A higher rating indicates that it charges extremely fast.
Then, drop a comment if you have anything to add!

From 8% to 100% mine takes an hour more or less

Now this is interesting.
I am using usb power meter alongside the supplied charger and cable in the box and I found that even after the phone showed 100% charge it continued to draw current (~300mAh) for another 20 minutes until stopped entirely.
So my total charge time from 0-100% was 2 hours and 44 minutes.
Also for the first ~60% charge the phone draw the full 1.55 amperes and after that gradually dropped down to 0.50 amperes.
While the charger runs little bit hot the phone was cold the entire time.

2 hours to charge from 15% to 42 %
too long

This is way too much. You have probably got defective charger/cable.
But! If you are trying to charge it from a pc then is normal as regular usb ports supply only 0.5A instead of the 1.55A from the original charger.

I just realize charger is defective
Should i fix it or buy new one
Idk if its the cable or adapter

Nowadays chargers are basic inverters with few more stuff.
They have very few components inside but sometimes, usually after hard hitting/dropping on hard surfaces the soldering can get damaged with varying consequence between simply stopping working to working abnormally as lowering voltage, current, overloading and many other things.
For example I had a strange case with fully working charger with healthy components and solder joints but was working on random intervals. It was caused by solder whiskers touching nearby naked track and causing shorts. If it was cheaper charger it would blow, but in this one the overvolt protection was able to save it.
And this is why you can just buy usb power tester like this one
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or even simpler like this one
so that you can check what kind of power your phone actually receive from charger/power bank/pc etc.
Our phone does not have fast charge. As such it will not charge faster no matter how powerful charger and cable you can equip it with. For example I have one with 2x2.4 Amperes supporting QC charger mods and etc. - it will draw only up to 1.55 Amperes within 5 Volts range.
The normal USB 2.0 port can supply with max 0.5 Amperes, USB 3.0 within the basic implementation can supply under 1 Ampere.
In simple language this means with usb 2 it would take up to 8 hours to charge from 0 to 100%, with usb 3 it would take about 4 hours and half from 0 to 100% battery.
Of course depending on the manufacturers you can find usb 3 and 3.1 ports that are able to supply way more current, even values like 3 Amperes and higher.
This is why the best way to charge your phone is to use the supplied charger. The cable is also very important because of the current depending on the used wire gauge.
With cheap cable (using thin wires) you would not only be unable to use the available current, you can find yourself in the middle of fire.
But there is a big problem, the price sometimes doesn`t represent the needed quality.
Notice I`m not talking about durability. I can show you cables strong enough to endure 10 kilograms but with so thin wires that can`t carry over 0,5A trough them.
Put your trust only on products that are widely commented and tested by the buyers.
Now, I have tested the cable supplied with the phone. Although it easily handles the 1.55A current used by the phone if you put over 2A it will get really, really warm. This means the wires are big enough but are not expected to handle high current. In simple words don`t use this cable for other things than charging this phone, just to be safe.
=====================================
TLDR;
If you don`t have the necessary skills don`t try to repair it. Any repair error can easily make it burst in flames. Better try with another charger but make sure it can get you at least 1.5A otherwise it would take really long time to charge.

Is there a fast charger available for this phone??

blake .l said:
Is there a fast charger available for this phone??
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yes, I recommend oppo charger. In just 2hrs the batt will be full.

Is there a way to charge faster? In my case I can charge my phone maximally at 5.19V / 1.42A. Charging from 0% to 100% phone with such parameters takes more than 3 hours, because amperage is adaptive.

kamil79123 said:
Is there a way to charge faster? In my case I can charge my phone maximally at 5.19V / 1.42A. Charging from 0% to 100% phone with such parameters takes more than 3 hours, because amperage is adaptive.
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Click to collapse
try to use oppo chargers