In playstore there are many apps which can display measured values of consumed/charged amps, actual batt.voltage, but none shows on which voltage is quickcharge currently operated (5V...20V). is there any app which has access to this value?
https://play.google.com/store/apps/details?id=com.gombosdev.ampere
Related
I have seen many posts about the enigma of charging with USB vs OEM vs Generic chargers, all of various output mA ranges, so I became curious. I used an app called CurrentWidget to log the charge current from a system proc file called "batt_chg_current" located under /sys. The capture was set to poll every 60 seconds, of which I tested 5 types of charging devices for a full charge cycle* (100% 3-4hrs). Each charger used is listed below noting the output in mA.
Chart Review
The slope you see is the battery reaching 75% charge, my theory: this is when the device drops the mA draw so the battery can "float charge" (to prevent overcharging) until the battery reaches 100%.
You'll also notice the USB took longer to charge then the regular higher output devices.
You may notice the "Generic USB Car" charger, which we have all seen available online for the bargain price of $3-10. While it is tempting, I would caution anyone from using this hardware because my phone actually rebooted during the charge cycle, which is visible in the chart*. You may also notice the erratic charging pattern, this was visible with another 1A generic USB charger, so I feel the probability of the device being defective was slim and more likely cheap components.
Chargers:
AC - Samsung OEM [750mA]
AC - Blackberry OEM [750mA]
Car - Samsung OEM [750mA]
Car - Generic USB [1000mA]
USB Computer - OEM U9 Cable
Thanks for the awesome info. Glad I've avoided the cheap stuff.
Sent from my SAMSUNG-SGH-I777 using XDA App
To add some clarifications:
1) You're obviously using my kernel since CW actually gets data. However you didn't read my kernel's OP regarding the scale factor for CW data.
2) That generic "1A" car charger is probably similar to the Monoprice car chargers I have. These are the one time in my life I've been dissatisfied with a Monoprice product. The ones I have are probably good for 300-400 mA at best.
3) Actual charge current limit is 650 mA on AC. 400 mA on USB
4) The dropping charge current at the end of the cycle is normal. Once a Li-Ion charger hits 4.2 volts, it holds voltage there and current drops. Once current drops below a certain threshold, charging is terminated. Note that "erratic" charging in the CV phase isn't a charger problem, just that our device counts CPU/screen usage against the charge current limit. "Erratic" charging during the CC phase is bad though.
Entropy512 said:
To add some clarifications:
1) You're obviously using my kernel since CW actually gets data. However you didn't read my kernel's OP regarding the scale factor for CW data.
2) That generic "1A" car charger is probably similar to the Monoprice car chargers I have. These are the one time in my life I've been dissatisfied with a Monoprice product. The ones I have are probably good for 300-400 mA at best.
3) Actual charge current limit is 650 mA on AC. 400 mA on USB
4) The dropping charge current at the end of the cycle is normal. Once a Li-Ion charger hits 4.2 volts, it holds voltage there and current drops. Once current drops below a certain threshold, charging is terminated. Note that "erratic" charging in the CV phase isn't a charger problem, just that our device counts CPU/screen usage against the charge current limit. "Erratic" charging during the CC phase is bad though.
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1. Correct, isn't everybody? its a solid kernel. Yup you're right, I totally missed the CW section. I have updated the chart to reflect the 2.85.
2. Yes, agreed
3. After updating numbers, per #1, the data reflects your statement.
4. Well stated.
So with the Current Widget installed I can monitor the incoming charge rates vs different usb chargers. Here is what i have found:
USB on samsung 1A charger: 10050mah
USB on computer: 4950mah
Shorted data pins usb cable on computer: 9550mah
MHL cable 2950mah max via any type of cable/charger.
This enevitably will drain the battery from 100% to below 10% within a few hours even plugged in. No marathon sessions of any type or even a casual flick if you start out below 50% remaining to begin with.
There must be a software override to force the current governor in the phone to allow the full amp in the charger be used in cases of MHL. Has this already been done? Anyone have a solution?
I dont think the current widget is accurate.
Sent from my SAMSUNG-SGH-I717 using XDA
accuracy
The Current Widget states support for the galaxy note, but only shows the current flow while charging (ie it will not report current drain rate) My testing and subsequent numbers are proved accurate by the charge rate over time vs displayed current rate vs battery state. So I believe in this case the numbers reported by Current Widget are quite accurate.
[email protected] said:
USB on samsung 1A charger: 10050mah
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That would be 10 amps - the battery would charge in no time
The rates are from a dump of a register on the phone and are ten times the ma being used/charged.
accuracy
This makes alot of sense, thank you. In this case the results are still valid as long as we divide the result by 10 at the end of the formula. The recharge rate with MHL is limited to 300ma, which inevitably leads to battery drain. There must be a software switch to override the maximum charge rate.
Charge cable
Use a cord meant for charging or a very short cord. The wire used in a normal usb micro cable is a very fine gage and gives enough voltage drop to severely limit the current. This is even with the high power charger or the shorted data lines
cord length
Thanks for the advice, but I have already tested multiple cables, down to just 2 feet. Voltage drop is negliable in any cable i have tested with. It is obviously a software limiter of some type. With MHL cable plugged in but not active, regardless of the source power, charge rate is limited to 300ma. Test it for yourself!
Read this thread, it's very informative.
http://forum.xda-developers.com/showthread.php?t=1519084
I have a Samsung MHL adapter and when I used it last night, the battery status showed "AC" but it only was drawing 460 ma according to the charging register (which the current widgit uses). With the same wall charger and cord plugged directly into my phone, the charging register starts out at 1007 ma and drops to the high 900's.
Hello,
I was wondering if it would be harmful to the battery of the Pace in the long run to use quick chargers to connect the charging dock, instead of a "normal" one or a computer USB port.
Thanks.
Yes.
Sent from my XT1635-02 using Tapatalk
Another false information.
quickcharger are only delivering higher voltages if the charger and the device have negotiated so.
if the pace doesn't do that, and it doesn't, it only get's the std 5 Volt.
Important is, if negotiate. If charger pushed higher voltage, watch is fried. There are couple of examples when people fried Pace with tje wall charger.
Another thing, modern chargers can deliver up to 2.4A, still with 5V. For Pace, anything above standard USB 500mA could be too much (bad power regulator design but expected in such small device).
And one more for the end. In general, higher charging current, higher temp, shorter battery life/capacity in long term.
This is longer explanation for the same answer
Sent from my XT1635-02 using Tapatalk
As far as I know the charger that comes with the phone is QC3 with a maximum output of 18 watts. So how is it possible to have the phone charging at 31.5 watts based on these numbers shown while charging? 2.625A×12V is 31.5 watts.
the charger should have 18 watts output. So it doesn't make sense. Are these values correct or is it showing wrong charging data??
please help me understand what's going on and how could this make sense.
I'm using the latest Nitrogen OS stable build with the kernel that's coming together with the ROM, charger is the one supplied with the phone.
it uses 5v not 12
bravo2526 said:
it uses 5v not 12
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Not true. The stock charger has three different modes 5V with 2.5A (12.5watts) / 9V with 2A (18 watts) / 12v with 1.5A (18watts) see the image below.
donnelldouglas said:
Not true. The stock charger has three different modes 5V with 2.5A (12.5watts) / 9V with 2A (18 watts) / 12v with 1.5A (18watts) see the image below.
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I'm usually charging with 3000-3320 mah
The other thing that caught my attention is that the Amperage and Voltage stay constant and it doesn't get lower after the battery 80-90% charged... this is very unusual as the chargers normally start reducing the Amperage and Voltage at that point, but not in this case...
D1stRU3T0R said:
I'm usually charging with 3000-3320 mah
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That's even more confusing to be honest!....with how many Volts? is it with the original charger?
I don't understand how can the charger perform much more than the rated values that is written on it, and if it can then why is it not advertised as a 30+ watts charger?!
Pretty sure the voltage/current sent by the charger gets converted to 5V xxxxmA by the charge controller or the charger sends 5V at different currents.
I increased my poco fast charge current limit to around 3000+mA from the 2800mA default which already shows that it probably charges on 5V.
Power meter shows 18-19W and phone shows around 3000mA. Makes it pretty obvious that the phone is being charged with 5V.
That's only my understanding it can be true or false.
donnelldouglas said:
The other thing that caught my attention is that the Amperage and Voltage stay constant and it doesn't get lower after the battery 80-90% charged... this is very unusual as the chargers normally start reducing the Amperage and Voltage at that point, but not in this case...
That's even more confusing to be honest!....with how many Volts? is it with the original charger?
I don't understand how can the charger perform much more than the rated values that is written on it, and if it can then why is it not advertised as a 30+ watts charger?!
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Click to collapse
Yes, original charger. Just flash extreme kernel with crystals magisk mode and you will have the same. It's safe.
What charging speeds can you get with QC, USB-PD or USB-PD PPS chargers? Higher than 7.5W / 5v 1.5A at least?
I see OnePlus lists it's charging speed as "18W Fast Charging (9V/2A)". And 9v doesn't match the 5v or 10v that I've read Dash/Warp/VOOC has used. So I'm hoping that means it supports more that just Dash/Warp.
If the nord n200 does require only Dash/Warp, anyone know which version?
According to this link:
https://www.reddit.com/r/oneplus/comments/u78u1o
The "PD" indicator on a cable with integrated power meter lights up, so the author thinks it is USB-PD.
Getting 10.2W (8.88v 1.15A) with QC. Battery was at 75% though. Have to test further at a lower charge level.
Used a Motorola "turbopower" USB-A charger, model: SC-22, which apparently does Qualcomm QC. Labeled as capable of 15W, 5v 3A, 9v 1.6A or 12v 1.2A.
~edit~
16.3W (8.94v 1.83A) via Qualcomm QC with a different cable and the battery at 10%. Max rate my charger is capable of.