Develop Bugs

[Q] Can I charge my arc with 1A?

Hi,
I've lost my charger, and I don't know if I can charge it with a charger with 5v - 1A or not, what I do know is that charging with USB is 5v - 500mA.
What's the power of the SE Arc original charger?

On the charger it says output 5V 1A
Is that what your looking for

It's Exactelly what I'm looking for thank you very much

The original SE charger for the arc is the GreenHeart charger EP800. It has got an output of 5V; 850mA.
As far as I know, there's no SE charger with an output of 1A. I've seen chargers with 500mA, 700mA and the 850mA.
My charger got fried during a power surge while holidaying in India so after asking around on the forum, I bought a Nokia AC-10N charger with an output of 5V, 1200mA. I've been using it without any problems. Pretty happy with it. Charges the phone much faster.

Thank you, that helps very much, but I heared charging the phone with higher voltage or higher Amperage can charge it faster, but it lowers the battery life on the long terme, it's appreciated to charge it with lower power in order to preserve battery life

MehdiArc said:
Thank you, that helps very much, but I heared charging the phone with higher voltage or higher Amperage can charge it faster, but it lowers the battery life on the long terme, it's appreciated to charge it with lower power in order to preserve battery life
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Totally true on all counts. You can really use ANY usb charger to charge your Arc, but the higher the mA the faster it will charge. And the higher the mA, the less overall life your battery will have. If it's normally supposed to be good for 5000 recharges, it might drop to 4000 recharges (just numbers pulled out of thin air).
The "Normal" standard for USB power is 0.5A (or 500mA). The iPad for example uses 1.0A, or twice as much as standard. Now in the iPad's case, it refuses to charge with anything less. I don't know if that's true for the Arc or not...if so, and the SE charger is rated at 850mA, then that's probably as low as you'd want to go just to be on the safe side.
Personally, I'm willing to use the iPad's charger and charge a bit faster for a bit lower useful battery lifetime. A new battery I can buy....time spent waiting for my phone to be charged I can't get back

The amperage rating on a charger defines the maximum current the charger is capable of supplying. A 1A charger doesnt force 1A down the throat of whatever's connected to it, if you connect something can only manage to pull a maximum of 500mA then it will only get 500mA.
Consumer power supplies are generally constant voltage. E.g. a 5V charger will supply 5V to anything connected to it. The amount of current that the device will draw at 5V is the amount it was designed to draw, up to the limit that the charger can supply. If the charger cant supply enough, generally you just get slower charging (though some poorly designed devices will just refuse to charge at all). What *will* tend to destroy your device quickly is a voltage mismatch, e.g. connecting a 5V phone to a 12V charger.
You can get constant current power supplies. These ramp up the voltage in order to force the required current out regardless of what's attached to it (even if that's a human being). They are scary.

daveybaby said:
The amperage rating on a charger defines the maximum current the charger is capable of supplying. A 1A charger doesnt force 1A down the throat of whatever's connected to it, if you connect something can only manage to pull a maximum of 500mA then it will only get 500mA.
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Exactelly what I was thinking, thanks.
Now I think I can charge my Arc with 1A without any problem, since it's gonna take only 850 mA from it

Charger

I have a car charger that outputs 5.3V and 2A. Will I damage my phone if I use this?

No because the phone will limit it plus it depends on the charges and cable whether it will take an AC charge or USB

Hi
milomak said:
I have a car charger that outputs 5.3V and 2A. Will I damage my phone if I use this?
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The amps aren't a problem as a device will only draw what it needs. The voltage requirements however for USB is 5 Volt +- 5%, which gives a valid range of a maximum 5.25V and minimum 4.75V. If that voltage of 5.3V is the measured voltage and is accurate, it is probably going to be fine, however if that voltage is what it states on the label, then that figure has some leeway also, so if the charger is leaning towards being over rather than under, it is going to be going quite a bit over the USB spec.
Regards
Phil

USB Charging Slow

Can someone tell me why is it that when i charge my phone when USB connected to PC its takes hours together to charge and Wall Charger takes 1/4th of that time why is that can anybody tell me what is the login behind it and which is best way to charge ?

USB only outputs 5v, which is why it takes makes longer. You have more power outputted from the ac adapter therefore it charges quicker. Simple as that. They will both eventually charge the device, but it's recommended you use the wall charger all it's faster, no one likes to wait

+1
U cannot compare usb charging with ur charger as output voltage varies across both n btw usb is jst an alternative for charger it's not a replacement
Sent from my LT22i using Tapatalk 2

You can use a custom kernel and change charging current.
Sent from my GT-N7100

Ok thanks Guys to know what is the main difference

Technically, voltage has little to do with charging. The amperage is what counts. USB on a computer gives ~500 milliamp, where ac chargers give 1-2 amps
Sent from my SGH-I997 using xda app-developers app

For a more detailed answer...
All compatible chargers output the same voltage, 5 volts. (Otherwise they just would burn out the charging circuits in the phone. It can happen both if there's too much volts and if there's too little, but for very different reasons.) However, voltage is not the only characteristic of electricity, the other most important is current, that is, amperes. Think of volts as 'water pressure' and amperes as 'amount of water pumped per minute' through a water pipe -- with real water, those are connected, with electricity they're quite separate.
Every source of stabilized electricity you will find in any kind of power supply will have a set voltage it outputs electricity at, and maximum current it can output. Trying to draw more current than it can supply can damage the power supply, so your phone limits the current it attempts to draw when it detects a standard USB port -- to what the USB standard says it should be able to safely supply. For standard ports, it's 500mA. Galaxy Note II by default plays it safe and draws 425mA. The stock AC charger is rated at 2000mA, and Note draws 1700mA when it detects one. This specifically affects the speed of charging -- AC chargers will charge battery faster, because three times more power gets in.
The USB standard was written before everyone and their mother started using it as a charger, and today, USB ports can usually handle more than 425mA, and on some computers they can supply just as much power as the stock AC charger. There are a few standard ways to detect how much current can a phone safely draw from an USB socket, but not all of them are universally accepted or correctly implemented, so the phone always plays it safe when it can't be sure. If you install a custom kernel, you can directly tell it how much power to draw if you know your USB port can handle it.

:good: :good::good::good::good::good:

aukhan said:
:good: :good::good::good::good::good:
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You can use the app Galaxy Charging Current (GCC) from the S3 thread which can measure the output of the incoming current. It will also allow you to detect faulty cables and chargers, as you will be able to see different ratings with different cables and chargers.
Testing on typical USB ports will get you a reading of 460, while the original charger and a good cable will give you 1800 (about the max current draw for the Note 2).
If you use a known good charger and get a lousy reading, it indicates a bad cable. I once had a cable give a readout of 100. I promptly threw it away.

Yes i am using that thanks nyways

Issue charging current mod

Hello everyone! My i9300 has some issues. I cut a USB cable female-male, i shorted data lines to the phone, and i take several chargers to measure the current
1. normal usb charger, max 4.8W-600-700mA
2. sam charger aproximative the same-600-700mA, and one time the ampermeter indicates 1A but now aprox 0.4A (
3.lm2576 suplly capable of 3A, the same crt 500-700mA
My kernel suports Stweaks, and i've set current to 1500mA, but the current didn't rise. What is the problem? It's clear that the phone charge with 1A ony on the stock wall charger, all the others neahhhh. I've tried with several usb cables and the same problem. Ideeas please?

On stock kernel will never rise above 1A. On custom kernel you must have a quality charger that can provide constant amperage. Otherwise the current will drop automatically to usb values (failsafe value)
Sent from my GT-I9300 using XDA Premium HD app

You're right. I bought a "quality" charger an the cuurent didnt't rise above 1A, in first seconds it stays on 1A but after that moment it drops to 0.6A even if i disable the safe margin.
The values in STweakes must be equal? All chargers that i've found are creappy! Nothing real, i've watched at one that say it can carry 3,1A but i don't think that it can power it's own led

Limit Charging Current? Slow/Trickle Charging

Hey guys, wondering if anyone has found a way to limit the charging current or voltage. I'm looking to slow charge my pixel overnight with the stock charger, thinking it would be better to keep the heat down to preserve battery health.
Reading the thread linked below gave me some hints so I have been messing with the parameter /sys/class/power_supply/battery/constant_charge_current_max but it does not permanently change the charging current, there seems to be some other program modifying the value as the phone charges. I've seen it as high as 3000000 (3A) and as low as 700000 (700mA). It seems to reduce current as the phone heats up.
Is there any way to lock this parameter at a constant value? Any other ideas on how to get slow charging? Do I need a custom kernel?
https://forum.xda-developers.com/pixel-xl/how-to/guide-limit-battery-charge-level-tasker-t3668059

bchaney16 said:
Hey guys, wondering if anyone has found a way to limit the charging current or voltage. I'm looking to slow charge my pixel overnight with the stock charger, thinking it would be better to keep the heat down to preserve battery health.
Reading the thread linked below gave me some hints so I have been messing with the parameter /sys/class/power_supply/battery/constant_charge_current_max but it does not permanently change the charging current, there seems to be some other program modifying the value as the phone charges. I've seen it as high as 3000000 (3A) and as low as 700000 (700mA). It seems to reduce current as the phone heats up.
Is there any way to lock this parameter at a constant value? Any other ideas on how to get slow charging? Do I need a custom kernel?
https://forum.xda-developers.com/pixel-xl/how-to/guide-limit-battery-charge-level-tasker-t3668059
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Easier - but perhaps less technically elegant solution that I use...use the old school Micro USB charger from prior generation phones with a Micro USB to Type C converter. I use the below from Anker...2 for $7.99 on Amazon. Works great for slow charging overnight - that's the exact use case I use it for. And I use the stock charger for rapid charging as needed throughout the day, before going out for the evening, etc...
[2 in 1 Pack] Anker USB-C to Micro USB Adapter, Converts USB Type-C input to Micro USB, Uses 56K Resistor, Works with MacBook, ChromeBook Pixel, Nexus 5X, Nexus 6P, OnePlus 2 and More
by Anker
Link: http://a.co/8m05Jnc

Good point, using a different charger is an option. I would prefer to control charging via software so that I can use the stock charger (I'm crazy and always buy/use the stock charger for my phones) and I don't have to carry multiple chargers when I travel. It would be great to have complete control over the charging levels and do a super slow trickle charge at a lower level than even an old micro USB charger outputs. Plus having a switch in Tasker to enable/disable quick charging would just be cool.

bchaney16 said:
Good point, using a different charger is an option. I would prefer to control charging via software so that I can use the stock charger (I'm crazy and always buy/use the stock charger for my phones) and I don't have to carry multiple chargers when I travel. It would be great to have complete control over the charging levels and do a super slow trickle charge at a lower level than even an old micro USB charger outputs. Plus having a switch in Tasker to enable/disable quick charging would just be cool.
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Completely agree and if you find a solution please post it back here. Would allow me to control charging better overnight when traveling. I also only travel with the stock charger - so I just use that and it rapid charges my phone overnight (assume once full or close to full it reverts to "trickle-charging" to keep at 100%). Having the ability to control via software would be more convenient, may prolong battery life, and allow me to ditch an extra cord on the bedside table at home.
Just thought I'd mention an interim alternative while you search for the ideal solution - which I hope you find.
Also - not sure if you have checked out / tested the following Magisk modules(there may be others - these are the ones I found in a quick scan of the XDA listing of modules)...they both seem like they may help address your situation - if not totally, but perhaps partially.....
MC's Charging Controller: Control when to enable / disable charging on your device
https://forum.xda-developers.com/apps/magisk/mcs-charging-controller-t3739371
Magic Charging Switch: Automatically pause/resume charging at set % levels to extend battery lifespan.
https://forum.xda-developers.com/apps/magisk/module-magic-charging-switch-cs-v2017-9-t3668427

any software solution found ? i want to lock the max charging current

nassim20 said:
any software solution found ? i want to lock the max charging current
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You probably need a custom kernel with current_max entries rw support.
Find your charging source in /sys/class/power_supply/. In my case, it is USB - when charging from micro USB and qpnp-dc - when charging from doc connector.
Make sure current_xxx_max is writable (qpnp-dc/current_max or usb/current_system_max has rw-r-r permissions).
And just run echo 500000 > /sys/class/power_supply/usb/current_xxx_max to limit charging current to 500 mA.
if your current_max is r-r-r (read only) - you need another kernel.
sb1893 said:
Completely agree and if you find a solution please post it back here.
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kucher5 said:
You probably need a custom kernel with current_max entries rw support.
Find your charging source in /sys/class/power_supply/. In my case, it is USB - when charging from micro USB and qpnp-dc - when charging from doc connector.
Make sure current_xxx_max is writable (qpnp-dc/current_max or usb/current_system_max has rw-r-r permissions).
And just run echo 500000 > /sys/class/power_supply/usb/current_xxx_max to limit charging current to 500 mA.
if your current_max is r-r-r (read only) - you need another kernel.
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thnx for the reply
i actually haaad this problem with a redmi, and i found a magisk module for it on telegram