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[Q] Can I use my Galaxy S4 Charging block....

with the included Moto G USB cable to charge the phone? Obviously, the G doesn't come with a wall adapter so I was wondering if this will be OK - i.e. same voltage, etc. - and not fry the battery.
Thanks

terrapin69 said:
with the included Moto G USB cable to charge the phone? Obviously, the G doesn't come with a wall adapter so I was wondering if this will be OK - i.e. same voltage, etc. - and not fry the battery.
Thanks
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Once i read that most new batteries (since 4 year ago to now) can use different chargers with higher amperage without being damaged, o i think you can. i think thats why they don't include charger, because most people already have one at home.

Fast charging causes reduction of long-term battery capacity
elestudiante said:
Once i read that most new batteries (since 4 years ago to now) can use different chargers with higher amperage without being damaged, so i think you can. i think thats why they don't include charger, because most people already have one at home.
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My response here to the above answer is what I understand as a layperson who has recently done internet research into this issue of which power adapters would be ok to use with the Moto G. I will be happy to stand corrected by anyone who has contradictory authoritative information.
My understanding is based on the Battery University website entries on lithium ion batteries:
batteryuniversity.com/learn/article/charging_lithium_ion_batteries
batteryuniversity.com/learn/article/ultra_fast_chargers
Although the above quoted answer on using the Galaxy S4 charger with the Moto G is mainly correct (in that no direct damage to the phone circuitry or immediate damage to the battery will occur by using the higher amperage charger), there still will be a long-term negative affect on battery capacity by using a higher amperage charger.
I believe the S4 comes with a 2A charger. According to Motorola online support website
( motorola-global-portal.custhelp.com/app/answers/prod_answer_detail/a_id/97318/p/30,6720,9050/action/auth )
the Moto G will automatically restrict charging above 1500mA. So that would mean that a 2A charger would cause the Moto G to charge at the 1500mA rate. No damage would be done to the phone circuitry charging at the allowable rate of 1500mA, but the question remains if there would be a long-term reduction of battery capacity by charging at 1500mA for a year or more. The official Motorola charger sold online is now 1200mA. So the comparison should be between charging at 1200mA versus 1500mA.
According to the Battery University website, the optimal range to charge lithium ion batteries is between .5C and .7C. Lower charging rates result in less reduction over time of battery capacity. The C-rate unit is used to measure charging and discharging rates. A value of 1C is equal to the rated amperage of the battery. So, for the Moto G, 1C is equal to 2070mA. Therefore, according to this recommendation, the optimal charging range for the Moto G would be between .5 x 2070 = 1035mA and .7 x 2070 = 1449mA. So, charging at the Moto G's maximum of 1500mA would be just barely outside the optimal range.
But extrapolation from Figure 1 in the Battery University 'Fast and Ultra-Fast Chargers' article indicates that there would be an additional 9% reduction of battery capacity by charging at a 300mA higher rate of 1500mA over the official charger rate of 1200mA. This additional reduction in capacity of 9% would be over 500 charging cycles, or about 1.5 years of average usage. The normal reduction in capacity just from aging over 500 cycles is already listed as 16%, so adding the 9% would bring it to a total of 25% loss of battery capacity after about 1.5 years.
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UPDATE and CORRECTION:
I have more authoritative information directly from Battery University that changes the conclusion I draw above based on my effort to extrapolate from the Battery University website article.
The extrapolation I did above was based on the additional loss of battery capacity cited when going from a 1C to 2C charging rate. But according to direct communication from Battery University, when charging at a rate below .7C there should be no measurable improvement to capacity by using slower charging rates. Charging above .7C would still be expected to add more stress to Lithium Ion Polymer batteries and likely add to long-term reduction of capacity.
So, what this means for the Moto G and Nexus 5 is that there should be no measurable difference between charging with 2A, 1.2A, 1A, or 850mA chargers as far as effect on long-term battery capacity goes. Both the Moto G and Nexus 5 are supposed to automatically restrict the charge rate at 1500mA even when using a faster charger, which is just at or below .7C for both phones. So, as long as the charger dependably keeps to 5V, a higher amperage 2A charger will be faster but pose no problem to long-term capacity.

Mi4c quickcharge fix????

Gsmarena wrote:
- Fast battery charging: 40% in 60 min (Quick Charge 2.0)
- XviD/DivX/MP4/H.264 player
- MP3/WAV/eAAC+/FLAC player
- Photo/video editor
- Document viewer
But Mi4 and other devices which support quickcharge 2.0 are: 60% in 30 min
I think Xiaomi mi4c was limited, so it charge slowly
how to unlock it to charge faster???
Who know??
thanks

Mine recharges 100% in a bit more than 1 hour (i guess 1h5m...i don't really mind these things). But I noticed it depends on the charger; with a COOLREALL charger, 5V 2 USB ports (which is 2.5 per port then), it takes 1h30mins or so. On the other side, with the original charger, which specs I don't exactly know, it takes, as I sad, around 1 hour. Notice that I don't use Data or any background activities while charging; sometimes I use Wi-Fi just for whatsapp web. I am currently running 6.17 developer CHINA, and some time ago I used the last global release, just in case so you know, it might be a software related issue. I remember that, with the vendor rom (gearbest) , it took me slightly more than the current recharging time. Some users reported having MIUI and fast charge not working, and some having CGM and not working.

I think MI4c doesn't quailify for QC2.0.
In China, it get an explosion issue in a year after launched.
The regular charge is not as slow as we compare to fast charge.

bshi said:
I think MI4c doesn't quailify for QC2.0.
In China, it get an explosion issue in a year after launched.
The regular charge is not as slow as we compare to fast charge.
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I'm running Mi4C with a third-party QC3.0 adapter. Goes from 0 to 80% in 30 min no problem. Full charge under 1 hour.
No overheating, no explosions.
I've only heard bad stories about charging this phone with generic 5V2A chargers.

Charging speed depends on the device temperature. Thermal engine decreases charging current in order to prevent overheating. If battery temp is below a certain threshold, device charging current is 1800mAh (max). Assuming that the battery capacity is 3000mA (and fully discharged), 0-60% should be ~1 hour. Keep in mind that batteries do not get fully discharged and your battery capacity might be degraded, so results may vary.

Is it safe to charge the device at low charging currents?

Hello everyone!
I recently purchased a Mi note 5 pro that comes with a 5V,2A charger out of the box.
While using it I realised the phone started warming up while charging with it- The phone reached a temperature of 42 deg C (well, the device got significantly warm).
Concerned, I tried out an old Samsung charger (5V,0.7A) with my Mi device and realised the charging temperature was much less (35 deg C) (here, the device remained cool).
Well, I wanted to know:
- Is it safe to charge the Li-ion battery at low charging currents (voltage is constant at 5V) ?
- Is it okay to use a different manufacturer's charger with my device (even if the charger is a genuine one)?
Also,
-I don't have a problem with longer charging times
-I frequently keep the device plugged in and maintain the charge between 20% and 80% (and full charge cycle once or twice a month)
-I am a heavy user but I avoid using the device while it is plugged in
-AccuBattery was the app I used for battery measurements
In the end I'm just curious to know how to prolong the battery life of my device and I'd really appreciate the help.
Thank you

1. Yes it's absolutely fine to charge at a low charging current. It is in fact better for the battery to charge it at a low current.
2. Yes, it's also absolutely fine to charge with different chargers, the quality of the charger is what is important.

willhemmens said:
1. Yes it's absolutely fine to charge at a low charging current. It is in fact better for the battery to charge it at a low current.
2. Yes, it's also absolutely fine to charge with different chargers, the quality of the charger is what is important.
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Thank you

[Q] How to bypass 6W fast charging software throttling during screen on?

(This is my first post. I hope this is the right place to post.)
I have observed that the S7 Edge's operating system does deliberately throttle the fast charging speed while the screen is on, apparently by sending a command to the charging circuitry.
Observations:
The maximum charging speed of the Galaxy S7 / S7 edge is usually 15 Watts (9V 1.67A). On a 5V USB charger, it can reach 1.8A, thus 9W.
But I have noticed that several Samsung phones, including the S7/S7 Edge, throttle / hard limit the fast charging speed to 6W (9V 0.67A or 5V 1.2A, measured using USB multimeter) while the device is in operation.
And by that I mean 6W total charging throughput. This means that if we assume the other device components need 2W in a moment, the battery only gets charged with 4W in that moment, which is nothing compared to the supposed 15W.
Some phones and pretty much all laptops use the superior spare current charging method, where the battery keeps charging at the same speed regardless of usage, because the power for the device components just gets drawn out in addition
Also, the S7 does charge at full speed with screen on, shortly after booting. This proves that it's not a hardware-controlled limitation, but that the operating system sends some kind of throttling command to the charging IC.
When the S7 is on bootloader screen, the charging speed is also not throttled. This means that Samsung's operating system has some kind of fault.
Manually applying 9V
When manually applying 9V (actually 9.5V for voltage drop compensation) using a laboratory power supply (and shorted USB data lanes to signal indefinite charging speeds), the S7 consumes 9V 1.8A during boot, which is 16.2W, of which obviously not all goes to the battery, because the battery is hard limited to 15W due to technical reasons.
But the deliberate software command of throttling to 6W during screen on is a serious handicap.
The 6W limit happens at any applied voltage. If I apply 7V, the 6W limit limits to around 0.85A. If I apply 6V, the current is around 1.0 A during screen on.
Is there a way to disable that software throttling command, and just keep charging at full speed during screen on?
The software might send some command to /sys/class/power_supply/battery, but I have not examined that enough yet.
About heat
If the battery temperature hits 35°C, the charging speed is limited to 10W, which is perfectly reasonable. I have not tested whether the 10W limit is induced by the charging controller hardware or the operating system, but it is to prevent further heating.
But the 6W hard limit during screen on happens at any temperature.
—————
Any help would be much appreciated.

An0n9 said:
(This is my first post. I hope this is the right place to post.)
I have observed that the S7 Edge's operating system does deliberately throttle the fast charging speed while the screen is on, apparently by sending a command to the charging circuitry.
Observations:
The maximum charging speed of the Galaxy S7 / S7 edge is usually 15 Watts (9V 1.67A). On a 5V USB charger, it can reach 1.8A, thus 9W.
But I have noticed that several Samsung phones, including the S7/S7 Edge, throttle / hard limit the fast charging speed to 6W (9V 0.67A or 5V 1.2A, measured using USB multimeter) while the device is in operation.
And by that I mean 6W total charging throughput. This means that if we assume the other device components need 2W in a moment, the battery only gets charged with 4W in that moment, which is nothing compared to the supposed 15W.
Some phones and pretty much all laptops use the superior spare current charging method, where the battery keeps charging at the same speed regardless of usage, because the power for the device components just gets drawn out in addition
Also, the S7 does charge at full speed with screen on, shortly after booting. This proves that it's not a hardware-controlled limitation, but that the operating system sends some kind of throttling command to the charging IC.
When the S7 is on bootloader screen, the charging speed is also not throttled. This means that Samsung's operating system has some kind of fault.
Manually applying 9V
When manually applying 9V (actually 9.5V for voltage drop compensation) using a laboratory power supply (and shorted USB data lanes to signal indefinite charging speeds), the S7 consumes 9V 1.8A during boot, which is 16.2W, of which obviously not all goes to the battery, because the battery is hard limited to 15W due to technical reasons.
But the deliberate software command of throttling to 6W during screen on is a serious handicap.
The 6W limit happens at any applied voltage. If I apply 7V, the 6W limit limits to around 0.85A. If I apply 6V, the current is around 1.0 A during screen on.
Is there a way to disable that software throttling command, and just keep charging at full speed during screen on?
The software might send some command to /sys/class/power_supply/battery, but I have not examined that enough yet.
About heat
If the battery temperature hits 35°C, the charging speed is limited to 10W, which is perfectly reasonable. I have not tested whether the 10W limit is induced by the charging controller hardware or the operating system, but it is to prevent further heating.
But the 6W hard limit during screen on happens at any temperature.
—————
Any help would be much appreciated.
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Click to collapse
There is a very good reason why you cannot access this setting.
Phone in use = heat, Battery Charging= heat, too much heat= blown up phone!
A laptop has big heat sink on the cpu and a cooling fan, phones do not.

Charging speed
cooltt said:
There is a very good reason why you cannot access this setting.
Phone in use = heat, Battery Charging= heat, too much heat= blown up phone!
A laptop has big heat sink on the cpu and a cooling fan, phones do not.
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Click to collapse
I know. But like I said:
The 6W limit occurs at any temperature, even at cold temperatures.
If the phone reaches 35°C, then it will throttle down charging speed anyway, no matter whether the device is in use or not.
I would like to have the full charging speed while the device is in use.
I don't mind some extra heat as much as charging much slower.

Samsung S10 only charges to 4.225 mV while turned on and upto 4.3 mV when turned off

i have a samsung galaxy s10 and somehow i notice that the charging speed is blazing fast from 89% to 100%. Then i monitor the peak voltage using AIDA64 and Accubattery. When my phone reached 100% it shows the voltage of 4.225 mV, i read that S10 supposed to charge upto 4.285 mV. After that i tried calibrating the battery by discharging it until my phone turned off by itself then charge to 100% while turned off and it shows 4.3 mV after i turned in on. What is happening to my phone and should i be worried about it?

In fact fast charging ramps down at about 80% then again around 90% in order to protect the battery. Excessive cold temperatures will cause fast charging not to engage.
You can't accurately measure Li charge level voltage or fast charge with the display on. If the display is on the power controller senses the excess power usage and ramps down fast charging. It will charge slowly at best.
To measure the voltage with Accubattery have the window open then turn off the display. When you turn it on you have about a second to see the voltage as it samples around every second or so.
It will immediately drop down then.
Depending on temperature, current draw and battery condition it may limit the top charge.
Fast charging to 100% stresses the battery needlessly as does constantly discharging below 20%. Li's prefer frequent midrange power cycling ie 40-72%. High cell voltage and temperature are their enemies. High discharge rates also can accelerate their degradation by driving up temperature.
Ideal minimum start charge temperature for fast charging is about 82F, minimum is 72F. If below about 55F fast charging will not engage for that charge cycle.
Cold charging Li's can cause Li plating which will permanently degrade the cell, a oid doing this!
NEVER attempt to charge an Li that is near freezing temperature

So thats the reason why my phone once dropped its percentage from 30% to 5% in an instant after having it in front of my car air conditioner. But is there a reason why my phone charged very fast from 89% to 100%?

It shouldn't drop that fast! Or charge faster near full charge. This is atypical performance.
You using the Samsung 25w brick and cable?
Erratic fast charging is a sign of a battery failure. Any swelling is a battery failure, replace asap.

Im using samsung 15w fast charging and btw i have replaced the battery around 5 months ago and i notice the fast charging speed only recently. Samsung didnt reset mt battery cycle when replacing the battery tho

Fixt1772 said:
Im using samsung 15w fast charging and btw i have replaced the battery around 5 months ago and i notice the fast charging speed only recently. Samsung didnt reset mt battery cycle when replacing the battery tho
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You need the 25 watt Samsung brick and cable.
15 watts will slow fast charging down if it works at all. If fast charging it should add about 2%@minute for 4100mAh battery in the 20-70% charging range.