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i have my magician battery drained and now it is not booting.
Even if I charge it in long hours still no luck to revive it.
I used Cotulla's O5 (WM6.5 for 64mb ram).
Anyone familiar with the issue? Thanks!
I had a Magician like that. Battery had to be shocked to restore it because leaving it drained for a long time caused internal shorts. To shock it, I used a variable 25V power supply applied to the battery contacts very briefly which makes a spark. I did that several times until the spark is smaller and the battery shows some voltage. This trick also works for other rechargeable batteries that refuse to charge.
Sometimes with Magician, it's not an internal battery short, but that the battery voltage is below a charging threshold. In that case, I used small wires to attach to the + and - battery terminals with the battery in the phone, and attached a variable power supply to raise the voltage to around 3.7V under load so that the phone will boot with the dead battery. Once it is booted and the LED is orange to show that it's charging, I remove the power supply and it will stay charging till the battery is full.
You could kill your phone doing this wrong and I don't know what equipment you have access to, but these are things that have worked for me. Although the simplest way is just to buy a new battery.
@GnatGoSplat
hi mate, this is really helpful!
GnatGoSplat said:
To shock it, I used a variable 25V power supply applied to the battery contacts very briefly which makes a spark. .
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With 25V power supply you can burn battery protection electronics inside in battery and it is possible in that case to overcharge the LiOn battery in next charge cycle and the end it can EXPLODE. In future you can try to apply 5V for little long time and you will achieve same results without any danger to burn battery electronics
Hi arjaylight
Before few days I have same problem with drained new Magician battery. I charged it for little time but the same results as yours, after hard reset the device boot normally.
That depends on the cause of the battery not charging. If battery voltage has fallen below charging thresholds, then applying 5V for a long time should work. If battery won't charge because of internal shorts, 5V will not burn off the internal shorts and the battery will just get warm. To blow out internal shorts, you need a much higher voltage across battery terminals for a very short time. Generally, you should just dispose of shorted batteries as you are correct that they could explode with any attempt to squeeze more life out of them.
Many People used a 9V Battery Block.
Connect only short but frequently ! After ca. 10 Shots maybe u have Luck.
I successfully make that with 2 Sony Ericsson Batterys from K800i.
Is the same Problem : Undervoltage or a little internal short.
Be carefull and patient !
battery drain
thanks for all your inputs.
im trying to find power suplly bu i think what is readily available is the 9v battery block. thanks moto26.
could you explain in details how you did this. 10 shots but how about the intervals? 5secs?
just a side note, after doing all of this if you find that it doesn't work for whatever reason. I found that the dealextreme batteries for the magician hold their charge well and they are very cheap compared to ebay etc.
Hi,
I have a HTC One S and I'm not able to switch it on. The only reaction is when charging - LED shines orange. I read about this problem and that it's probably broken, but still I wanted to try some things. Would it be possible that the battery is completely broken, because the LED keeps shining orange, and therefore the phone cannot boot? I wanted to measure the capacity of the battery with a multimeter, but I can't find the data sheet for the battery, so does anybody have a datasheet or knows which pins I have to use? Or is it senseless? This is the battery: https://www.amazon.de/BJ40100-Original-HTC-Akku-1650mAh/dp/B00CJI6VAE
Thanks in advance,
cr0w
just try the pins in different combination, if you are measuring volts you can't damage the battery. If battery is too low it is possible that phone can not start charging it, but it also mean the battery can be worn out. Once I was able to jump start a battery that was too low by applying around 4 volts (not more) with a power supply for around a minute, but you have to be careful as Li Ion batteries tend to explode if not treated well
Recently bought lg g4 used so it comes with a conventional charger .... It takes 3.30 hour to get 0-98%
So i borrowed quick charger 3.0 now it is charging really quick 5-75% in 1hour but cpu temps becomes high 45° to 58°C & battery temps remains normal 15-18.5°C
So i wanna know are these cpu temps normal during charging or not?
Thanks in advance
NzacK said:
Recently bought lg g4 used so it comes with a conventional charger .... It takes 3.30 hour to get 0-98%
So i borrowed quick charger 3.0 now it is charging really quick 5-75% in 1hour but cpu temps becomes high 45° to 58°C & battery temps remains normal 15-18.5°C
So i wanna know are these cpu temps normal during charging or not?
Thanks in advance
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Greetings and welcome to assist. It looks like you have already asked your question here
http://forum.xda-developers.com/showthread.php?t=3493702
so I will close this one up
Good Luck
Sawdoctor
I use USB tethering every single day, and to get the maximum speed, I have my P40 Pro connected to the USB-C plug on my PC. However, this makes the P40 Pro FAST CHARGE as if its life depends on it.
This is horrible for the battery life, is there any way to disable fast charging?
Use a cable wich doesn't suport fast charging.
Shymmy said:
Use a cable wich doesn't suport fast charging.
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won't that also lower the data speed?
lolan11628 said:
won't that also lower the data speed?
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It shouldn't. Test it.
If you don't take the battery below 40% or above 80% when charging, fast charging should not impact battery longevity much.
The former stresses the battery a lot.
Li's love frequent midrange charging... it can extent battery life by hundreds even thousands of charge cycles.
High cell voltage and excessive temperature are Li's biggest enemies.
Try to avoid cold charging >82°F start temperature, avoid charging an Li below 72F and never charge one that's near or below freezing temperatures! Li plating can occur when charging at low temperatures, it will permanently degrade the battery if it occurs.
Charging is a electrochemical reaction that requires heat to function properly.
Never charge if above 100F though as this is near the top end cutoff for charging. Cool the phone with air and/or a damp microfiber cloth in hot ambient temperatures (>95F) when charging or using.
blackhawk said:
It shouldn't. Test it.
If you don't take the battery below 40% or above 80% when charging, fast charging should not impact battery longevity much.
The former stresses the battery a lot.
Li's love frequent midrange charging... it can extent battery life by hundreds even thousands of charge cycles.
High cell voltage and excessive temperature are Li's biggest enemies.
Try to avoid cold charging >82°F start temperature, avoid charging an Li below 72F and never charge one that's near or below freezing temperatures! Li plating can occur when charging at low temperatures, it will permanently degrade the battery if it occurs.
Charging is a electrochemical reaction that requires heat to function properly.
Never charge if above 100F though as this is near the top end cutoff for charging. Cool the phone with air and/or a damp microfiber cloth in hot ambient temperatures (>95F) when charging or using.
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Well, the issue is that I use my phone for USB tethering every single day, and Huawei doesn't include any setting to limit the capacity to stop charging at for example 80%
My Samsung tablet for example has this setting natively.... Huawei for some reason refuses to add this.
lolan11628 said:
Well, the issue is that I use my phone for USB tethering every single day, and Huawei doesn't include any setting to limit the capacity to stop charging at for example 80%
My Samsung tablet for example has this setting natively.... Huawei for some reason refuses to add this.
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My Note 10+ doesn't either
Always doing it the hard way like a bad gf
That's one way to boost OEM battery sales...
Hey, but P40 pro has the smart charging mode ... don't you have it activated ??
Shymmy said:
Hey, but P40 pro has the smart charging mode ... don't you have it activated ??
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I have, but that doesn't actually disable fast charging, nor does it actually stop charging before the battery is completely full. It only in theory does some things when 'it' guesses is appropriate, so it's useless. I haven't really noticed anything.
I looked at the phone exactly when it displayed the message that the phone stopped charging at 80% and that it will be resumed at a certain time (I don't know exactly, about 3 hours).
Since you already know that Pixel 4a supports 18W charging through USB C-C using USB-PD. Is it possible to charge the device a bit more slowly to keep the battery cool and possibly increase its life span?
A simple Google search showed that by using USB A-C cable, it won't be doing USB-PD quick charging instead it will charge using USB-BC (Battery Charging, a legacy standard) which will limit the power at around 7W.
By attaching USB-C end of the quick switch adapter(OTG) that came with the device to power adapter and connecting its other end (USB-A) to the device itself by running a USB A-C cable in between. Will this make the device charge slowly? Can anyone test this?
To find out for sure how much current is being used to charge your phone, you should install an app like this:
Ampere - Apps on Google Play
Measure the charging and discharging current of your battery.
play.google.com
JohnC said:
To find out for sure how much current is being used to charge your phone, you should install an app like this:
Ampere - Apps on Google Play
Measure the charging and discharging current of your battery.
play.google.com
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question is on how to slow charge the device
Well, just get a 1amp charger or use a non-quick charge cable.
The problem is that you won't know if an amazon description for a cable is accurate or not.
So, the way to make sure it is charging slow, is to use the app I mentioned.
I charge my pixel 4a with a 350 mah charger (it is an old Motorola charger in micro usb, i just put à micro usb to usb c little gizmo).
It is around 1,5 w and charge my pixel 4a in around 10 hours , if the pixel is completly empty. You can also use a 5w charger with a usb a usb c câble, it will be faster but warmer
Any brick or cable that doesn't support that protocol or can't supply enough amps will cause the power controller to default to slow charging.
Most fast charging capable phones also have a software option to disable fast charging regardless of the brick/cable's rating.
The real trick is getting it to fast charge when you want it to
My goal was to charge my pixel 4a during the night with the slowest method to keep my battery as Healthy as possible. The 350mah just give me that. ( i keep my phone four to five years so i Try to take care of my battery)
lop1 said:
My goal was to charge my pixel 4a during the night with the slowest method to keep my battery as Healthy as possible. The 350mah just give me that. ( i keep my phone four to five years so i Try to take care of my battery)
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Don't let it drop below 40% or charge beyond 72% in that case.
At some point it's just easier to replace the battery though
blackhawk said:
Don't let it drop below 40% or charge beyond 72% in that case.
At some point it's just easier to replace the battery though
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This seems more an urban legend this 40 72%, the charging processor take care of that For you.
lop1 said:
This seems more an urban legend this 40 72%, the charging processor take care of that For you.
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Li's prefer midrange usage with frequent partial charges. Cuts down the heat and the high cell voltage that degrades them faster. Degrades them only a fraction of a full charge cycle. Longer lifespan and less time charging for the same amount of mAh. Win-win.
Even today many confuse their requirements with NiCads Thinking they should fully charge/discharge them. Trying to convince some them otherwise is like talking an alcoholic out of drinking booze. "I've always done it that way..."
@blackhawk
but if someone who follows this 40-80 rule, how to reset battery stats?
Can it be done using ADB command?
ashutoshmn said:
@blackhawk
but if someone who follows this 40-80 rule, how to reset battery stats?
Can it be done using ADB command?
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I really don't use those stats at all. More Google hype that never proved all that useful for me.
I use Galaxy Labs Battery Tracker, the history log* of Accubattery as well as karma Firewall logs to track usage.
Occasionally you may want to do a calibration too as the % accuracy will drift over time.
*as long as my usage stays at >10%@ hour SOT, I'm not very concerned
blackhawk said:
I really don't use those stats at all. More Google hype that never proved all that useful for me.
I use Galaxy Labs Battery Tracker, the history log* of Accubattery as well as karma Firewall logs to track usage.
Occasionally you may want to do a calibration too as the % accuracy will drift over time.
*as long as my usage stays at >10%@ hour SOT, I'm not very concerned
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and by calibration, do you mean drain to 0 and charge to 100 every once in a while?
ashutoshmn said:
and by calibration, do you mean drain to 0 and charge to 100 every once in a while?
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Yeah, which I don't like doing. If falls way out of calibration you'll think you're at 20% when in fact you're at 7% for example.
Many say to repeat the calibration cycle 2 or 3 times for it to take.
If the battery has failed this can be a dangerous procedure. How do I know? Just had a battery failure but because of the case didn't see the back cover bulging. All the while I was happily torturing the bad cell for over a month begging it to do its worse
I was fortunate it didn't damage the display of my Note 10+ or worse.
If you encounter erratic fast charging, reduced battery capacity always suspect a battery failure and look for the telltale back cover bulge. These bag Li's can fail at any time especially as they get older.
BTW, people who are reading this, you can charge your 4a at 7.5W (5V*1.5A) using OTG adapter plugged into the charger and a USB A-C cable. The temp. increase of battery is way less than full fast charge of 18W.
ashutoshmn said:
BTW, people who are reading this, you can charge your 4a at 7.5W (5V*1.5A) using OTG adapter plugged into the charger and a USB A-C cable. The temp. increase of battery is way less than full fast charge of 18W.
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Also bare in mind that even when slow charging you never want the Li cell temp below 72°F, but 82F is a better bottom threshold temperature.
Li plating* can result from cold or hot (>100F) charging regardless of charging rate.
NEVER EVER attempt to charge an Li in near freezing temperatures*
*this can lead to a thermal runaway event
blackhawk said:
Also bare in mind that even when slow charging you never want the Li cell temp below 72°F, but 82F is a better bottom threshold temperature.
Li plating* can result from cold or hot (>100F) charging regardless of charging rate.
NEVER EVER attempt to charge an Li in near freezing temperatures*
*this can lead to a thermal runaway event
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Click to collapse
Billions of Li devices in service around the globe. If this was a 'thing' manufactures would prevent charging at low temps. Not debating the wisdom or detremental effects on longevity of charging at low/high temps. No need to season the spew with faux drama.
DB126 said:
Billions of Li devices in service around the globe. If this was a 'thing' manufactures would prevent charging at low temps. Not debating the wisdom or detremental effects on longevity of charging at low/high temps. No need to season the spew with faux drama.
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Do what you want... and you're own research*.
You offer zero good advice and a half mass flame attempt.
Lead me, follow me or get the hell out of my way.
*https://www.sciencedirect.com/scien...of the internal,also affect the battery power.
Temperatures I suggested are for optimum performance/longevity with minimum chance of Li plating from multiple sources. They are very conservative.
I just had a battery failure on my Note 10+ that started by slow charging it to 100% at about 45-50°F. Boom, just like that. Took over a month to realize what had happened but that's what started the whole mess. I was fortunate the swollen battery didn't damage my display.
Oy vey - self-designated expert in a box with a short fuse. Happy Mother's day, champ.
DB126 said:
Oy vey - self-designated expert in a box with a short fuse. Happy Mother's day, champ.
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WYSIWYU... call it like I see it.
Mum's been dead for decades.
Hope your's is not... spend some time with her.
You only get one.