Hi!
Question: When an XDA is placed in the cradle (w/ charging) or car mount it starts charging and the LED goes orange. After the battery is full the LED turns green. So far so good. What actually happens in the device when it decides it is full? Is the battery "disconnected" by some means? I mean if the device is working (navigation) is it drawing power from the battery which in turn gets instantly replaced from the charger or is the battery left alone and the device just draws power from the charger?
I was wondering if it is possible to turn off "charging" by some little tool or hack. Reason is that I use my XDA for navigation and I hate the feeling of allowing memory effect when I put the device in at 70% battery power, drive somewhere, take it out at 100% and then put it back in at 90% for the way home. My navikit unfortunately does not allow disabling charging, because there is only one button that powers GPS mouse, charging and speaker.
I know that playing with this is potentially dangerous, but I am just wondering. If there is no way I think I should take the navikit to some who can solder...
Any ideas?
Li-ion batteries don't suffer from the lazy battery or memory effect like Ni-Cd or Ni-Mh batteries do. I would surmise that the charging circuitry is deactivated once another primary power source is detected. According to battery-university.com , Li-ion batteries used in cell phone chargers don't enter the so-called "trickle charge" mode as Ni-Cd and Ni-MH batteries do.
http://www.batteryuniversity.com/partone-21.htm
Hope this helps,
Triband81 said:
Li-ion batteries don't suffer from the lazy battery or memory effect like Ni-Cd or Ni-Mh batteries do.
I'd really love to believe this. But check out this. When I run low on power I usually "discharge" as good as possible before recharging. Like disabling auto-off for device and backlight and giving the CPU some stupid load. At some point the device just gives up and turns off. That should mean "battery empty", right. Turning it back on after this gives me only a minute or a few seconds of idle runtime. Battery empty, one thinks. One day when I considered the battery discharged I exited a program which locked the device completely. The backlight was on but there was absolutely no reaction to ANY button or digitizer tap. Not even the power button worked. Fine I thought, perfect battery drain mode. The XDA ran for another 45mins with backlight blazing. 45 minutes of backlight. That's 6 hours of standby or 30mins of usage.
So maybe there is a memory effect which is not quite as high. Or maybe the XDA circuitry is designed to be so "secure" (as not allowed complete drain) by default.
Whatever. Thanks for your input and time. Will check out the link now.
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no it's not memory it's because the cpu and everything apart from the screen is off
but the tool reporting the % calc with the current being used when it's running and thats with cpu gsm and everything on
also all li-ion die after about 2 years and in the end of their life they start to act pretty funny
Yes it sounds like a catch-22 and that's exactly what I think it is.
Yesterday my phone battery bailed on me. So I plug it in for a night and wake up to see it hasn't charged at all. It's still off and continually displaying the battery charging icon, after which it shows the Samsung Galaxy S2 logo, after which it dies. This goes on forever.
I've tried different outlets, also my computer's USB port, but to no avail. I have the impression that it wants to be on to charge, and since it does not have enough power to start, it won't charge. Seems like the amount of power from the charger suddenly isn't enough to start, or that the device tries to start before the battery can handle it.
This evening, after not trying anything for an entire day, I got it to show the CyanogenMod logo, but it got stuck on loading. So I took it out, wanted to go into the CWM to wipe some settings and have a clean installation, but then it bailed on me again.
Now I'm back in the endless charge-start-die loop. What can I do?
Hi,
I think your battery is messed up, buy a new battery. Or make it go into recovery mode. Or, go to your nearest Samsung Centre.
Sent from my GT-I9100 using XDA Premium
Do you have a multimeter to check the voltage of the battery?
Either you will need another phone that will accept the battery to charge it or your can charge the battery externally with a lithium charger (think Remote Control cars, planes, helis)
or ebay for a new battery.
---------- Post added at 08:20 PM ---------- Previous post was at 07:58 PM ----------
BTW Lithium batteries will die very quickly i not kept above the correct voltage. Li-Ion are charged in two stages. Constant current, and then constant voltage.
Constant current is to apply 500ma at around 3.7 or 4 volts per cell till the battery voltage gets to its upper limit depending on what battery chemistry you have. Then keeping the voltage at that limit, reduce the current continually till the battery is fully charged. As I do not know the max voltage for the cell, I will just assume that 3.5v will be a safe amount.
So to charge, simply apply 3.5 volts to the phone battery for a few minutes at a time, with a resistor or light bulb in between so the current is limited, then checking it back in your phone inbetween to see if it charges.
If you are confused at the major concepts here then just buy a new battery, to save breaking you or your phone.
I'm travelling around in Asia but the local market had a place that had proper equipment. I managed to fix the battery by charging it with an external one-fits-all charger (where you can put the positive and negative leads anywhere). After that I can just use the phone again and charge it normally.
If the phone didn't try to start but would just charge the battery when plugged into the mains, this would also have worked. Anyway, I had a new battery made (I'm in China so they just pack a random battery with some rubber to make the size fit into some stickers and that works). Funny thing is, it has 1900mAh, a lot more than the original battery, though being a lot smaller in size. I hope it will last...
thanks for the tips
Hi guys,
i have the same trouble of him, and i can share you that my wife and me just bought two galaxy s2 white from France...they are totally new (two weeks ago).
Here the bug i confirm, if we are out of battery, then to plug it in the official craddle of my car, with the official charger will power on automatically the phone, then it will loop in on---off--on--of, because not enough power to keep the phone charging.
I confirm that the only way to make the phone charging correctly is to plug it with the power socekt wall charger, by the car there is no way.
It seems the difference between the car charging and the house charging is that in the car when it is plugged the phone power on auto, in the house the phone charge without powering on the phone....
Is there a way to force in the car with the craddle to charge some minutes without the need to power on it auto ??
Your battery is not dead, or in France my wife and me got the similar issue and it is really not possilbe...
Hi,
have you tried to remove the battery from the phone for at least a couple of hours and then put the battery again and plug it?. I had the same issue and doing this I could charge the phone after a couple of tries. I hope you got luck with this.
I've tried it but it wouldn't work. A separate charger (charge outside the phone) did the trick, no more problems since then.
s73v3. said:
Do you have a multimeter to check the voltage of the battery?
Either you will need another phone that will accept the battery to charge it or your can charge the battery externally with a lithium charger (think Remote Control cars, planes, helis)
or ebay for a new battery.
---------- Post added at 08:20 PM ---------- Previous post was at 07:58 PM ----------
BTW Lithium batteries will die very quickly i not kept above the correct voltage. Li-Ion are charged in two stages. Constant current, and then constant voltage.
Constant current is to apply 500ma at around 3.7 or 4 volts per cell till the battery voltage gets to its upper limit depending on what battery chemistry you have. Then keeping the voltage at that limit, reduce the current continually till the battery is fully charged. As I do not know the max voltage for the cell, I will just assume that 3.5v will be a safe amount.
So to charge, simply apply 3.5 volts to the phone battery for a few minutes at a time, with a resistor or light bulb in between so the current is limited, then checking it back in your phone inbetween to see if it charges.
If you are confused at the major concepts here then just buy a new battery, to save breaking you or your phone.
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Click to collapse
1 Cell lithium batteries like phone batteries are nominally 3.7v but their voltage depends on charge. They should generally be charged to a maximum of 4.2V, and not discharged below 3.3V/3V, depending on who you ask. You don't want to get it wrong though - look up what happens if you overcharge a lithium battery on youtube!
Same Problem Battery Logo Boot Loop
Has this problem been solved ?
I have the same Battery Logo Boot Loop
I have several batteries, and a separate charger ... batteries at 100%
The problem occurred while phone was in use, connected to wall charger, and had reached 100% .
I continued to use the phone while plugged into charger.
Phone shut down with a Battery Logo showing only a thin green line at bottom.
I turned phone off and swapped in a hot battery, but phone would not turn on.
Stays totally black screen, will not enter Download mode or Recovery mode.
With charger plugged in it will go into the Battery Logo Boot Loop.
The blue light next to the power button flashes, the Battery Logo appears for a few seconds then screen goes black and cycle repeats.
Any help will be appreciated.
Thanks
AnselRoe
Hi all i have a problem with my sgs2 i don't know if it is the battery the charger , Apps or charging port. When the battery gauge shows 1% i can't charge my phone it stops to 2% when i plug to usb it can't connect as mass storage properly and when even the phone shows full charge then i unplug it battery gauge falls suddenly to 60% as an example i have try changing two usb cables same issue plz help
Hi,
I have a Samsung tablet TAB 4 – SM-T530 which shows problem when charging: charging paused, battery temperature too low.
Using an app, I found out the battery temperature is shown constantly as -20°C, even when there is not charger plugged.
Do you know where the problem might be?
Do you know where the battery temperature sensor is located?
Do you know if the battery temperature can be overwritten in order to allow the charging?
One blue wire coming from the battery to the motherboard shows 0V constantly, the other blue wire 0.4V
Thank you in advance!
Hello
A friend gave me a broken Xiaomi Redmi Note 4. The phone has a broken and bent screen and a battery problem. First of all, the battery has a capacity of only about 400 mAh instead of 4000 mAh (I checked with a Keweisi USB voltage meter).
Secondly, the phone without the charger connected turns on until it displays the "Mi" logo, then you can see the black screen and hear the warning sound of a discharged battery and the phone turns off. If I plug in the charger and try to turn on the phone, it turns on and works normally, the charger can already be removed. Of course, due to the very low battery capacity, it discharges very quickly and switches off when the battery is about 20% charged.
There is no doubt that the battery is defective. But I wonder if if I change the battery and the screen, the phone will work normally again, or maybe the fact that without the charger it turns on and off after a while is a bigger problem, for example the motherboard. But I think that if it was a motherboard the phone would not turn on at all. What do you think?
0
Anyone had success with running ACC https://github.com/VR-25/acc with Zenfone 9 ? For me it does not stop charging (tried test with 3 methods). Or maybe someone uses any other stop charging method/app?
I know I can limit chaging to 80% with Asus ROM, but what I do not know, what happens next - once charging thershold is reached, does then phone get's power directly from charger not from battery? Because if it get's from battery, means phone is charging battery, every time it will drop 1%, which is bad.
According to someone in Asus forum, it indeed uses trickle charging:
Re: How battery care charging limitworks? What happens after charging will reach X%?
phone just stop pulling power from the wall, before its drop to 79% its start to charge again, u can monitor this behavior by using usb tester, its also known as trickle charging.
zentalk.asus.com
which means still battery life decreases. Which means it still needs some root solution, to stop charging at all :/