I made my very own battery extender. 1850mAh for now, soon 2000mAh and later, 2500mAh. You can find the information on my website at http://www.powercx.com/xda-ii
So far, I can use this on a lot of devices under 5.5v. This only produces 4.8v, so no regulator is needed. You can use any 4 AA battery, preferably rechargeable battery since they have higher amp.
I was able to get 7.5 hours of continuous usage listening to my MP3 on my network using WiFi to download the music on full brightness. This test includes the extender fully charged and once it's finished, it drained my internal battery. 7.5 hours is only 30% left. Without the internal battery, it last 6 hours on the battery extender alone.
Not satisfied with the performance of my Galaxy S3 original battery now. Found a helpful review on Amazon:
“…MPJ pushed from 100%->18% battery.
Screen: Time on, 2h, 24m, 26s
Ingress: CPU total 1h 56m 2, CPU foreground 1h 55m 48s, GPS 2h 26m 54s.
These are pretty punishing numbers. Battery Monitor Widget informed me that the battery consumption was ~994 mA.
The Anker was pushed from 100->14%
Screen: 2h 13m 46s,
Ingress: CPU total 1h 33m 19s, foreground 1h 32m 43s, GPS 2h 10m 33s…”
I am ripe for picking both of them, but got one more question left. Does the longevity of aftermarket battery is same as original battery?
wycure said:
Not satisfied with the performance of my Galaxy S3 original battery now. Found a helpful review on Amazon:
“…MPJ pushed from 100%->18% battery.
Screen: Time on, 2h, 24m, 26s
Ingress: CPU total 1h 56m 2, CPU foreground 1h 55m 48s, GPS 2h 26m 54s.
These are pretty punishing numbers. Battery Monitor Widget informed me that the battery consumption was ~994 mA.
The Anker was pushed from 100->14%
Screen: 2h 13m 46s,
Ingress: CPU total 1h 33m 19s, foreground 1h 32m 43s, GPS 2h 10m 33s…”
I am ripe for picking both of them, but got one more question left. Does the longevity of aftermarket battery is same as original battery?
Click to expand...
Click to collapse
Inevitably....no
I'd say, go with Ankers just for their aftermarket customer support. Otherwise, keep purchasing extra stocks.
I have tried the way you said, but my s4 still runs out of power quickly. Seems not really useful.
I have carried out a battery capacity test in 3 different ways through USB meter (slow USB port charge of 0.5 A, fast charge with original charger of 2A. and Accubattery pro app) obtaining the same capacity of 3.600 mAh, 400 mAh less than the capacity of 4.000 claimed by the manufacturer. Could someone to perform their own tests to check if the 4000 mah battery is scam or particular of my device?
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edited.
Accubattery only estimates the capacity based on charging cycles while the phone is powered on.
To get accurate estimate from that you would need to do repeat charge cycles of zero to 100%
^^^ Not really recommended.
My estimated capacity is 3,707 mAh, after 53 sessions (not doing the above).
But my health Battery Capacity graph has peaked at close to 4,000.
Your pictures would not load for me, so haven't looked at them.
But I say you would have do the same with repeat USB meter readings (full charge cycles) to get an accurate estimate of capacity.
corkiejp said:
Accubattery only estimates the capacity based on charging cycles while the phone is powered on.
To get accurate estimate from that you would need to do repeat charge cycles of zero to 100%
^^^ Not really recommended.
My estimated capacity is 3,707 mAh, after 53 sessions (not doing the above).
But my health Battery Capacity graph has peaked at close to 4,000.
Your pictures would not load for me, so haven't looked at them.
But I say you would have do the same with repeat USB meter readings (full charge cycles) to get an accurate estimate of capacity.
Click to expand...
Click to collapse
All tests performed have been complete charge cycles (100% to 0% and full charge 0-100%, phone off).
corkiejp said:
Accubattery only estimates the capacity based on charging cycles while the phone is powered on.
To get accurate estimate from that you would need to do repeat charge cycles of zero to 100%
^^^ Not really recommended.
.
Click to expand...
Click to collapse
Ganapatya said:
All tests performed have been complete charge cycles (100% to 0% and full charge 0-100%, phone off).
Click to expand...
Click to collapse
Have a look of accubattery results after more than a month has passed. (you only have 1 session in pictures).
It only gets good estimates after repeated charge cycles (with the device on). If your device is powered off accubattery , can not monitor the charge applied.
https://www.howtogeek.com/343535/how-to-monitor-your-android-devices-battery-health/
corkiejp said:
Have a look of accubattery results after more than a month has passed. (you only have 1 session in pictures).
It only gets good estimates after repeated charge cycles (with the device on). If your device is powered off accubattery , can not monitor the charge applied.
https://www.howtogeek.com/343535/how-to-monitor-your-android-devices-battery-health/
Click to expand...
Click to collapse
It is more reliable the measurement given by the usb tester with the phone off, than the one estimated by an application that needs to have the phone on with the consequent battery charge expenditure that can alter the reliability of the charge measurement. The successive measurements of accubattery only reflect arithmetic means of the different charges (total or partial charges)
@Ganapatya Only as good as the quality of the USB Tester in use.
Plus while your testing battery in your phone, you will never get a full charge on the battery.
Because android never charges the battery completely, or completely drains it. No matter what the percentages show.
So in the end the only fully reliable way to verify capacity would be to pin the battery to an external meter.
Click to expand...
Click to collapse
https://android.stackexchange.com/q...ity-of-a-battery-in-mah-received-fake-battery
How does a phone battery percentage display work?
So 400 mAh your missing, would be accounted by the 5% on both ends.
Thats what accubattery says on my charge. 36% until 100%
My last test for SOT and charging, show me -7940 mAh Charged at 1%. So consider another 99% as 3960 mAh; 100% only -3980 mAh. OMG, Xiaomi has put negative-capacity battery at my phone!
Hahaha, Joking aside. That show us sometimes the reading can be off the chart. After I charge it to full, the charged capacity shows me around ~3900 mAh. Video tear down from various sources, also show the label 4000 mAh. There is no evidence to believe it is real 4000 mAh, unless we tear it down and test it by ourself. And even then, it doesn't guaranteed that our test is accurate, as other have pointed out. That is too much for most users out there. We got to believe what they give us.
A rule of thumb is compare the average SOT without gaming to another user. Then compare the average SOT of another phone with the similar spec (example Asus ZMPM1) and scale the battery capacity to the SOT achieved. Although battery consumption relies on so many factor, but the average should give a baseline. If it doesn't differ much, then we can hopefully believe the claim of capacity made.
I am getting around 10-12 hours of SOT with my usage (almost no gaming). Other users got almost similar average result, so this should point to the same average of 10 hours SOT. Some might get better, some might get worse, depends on their usage and many factors.
You got 3600 mAh at 5V. This is 3600*5=18000 mWh or 18 Wh.
You battery stores 4000 mAh at 3.7V. This is 4000*3.7=14800 mWh or 14.8 Wh. Or: you fully charged your 4000 mAh battery and used 3.2Wh to keep your phone running during this time. No problems here.
Desmanto said:
My last test for SOT and charging, show me -7940 mAh Charged at 1%. So consider another 99% as 3960 mAh; 100% only -3980 mAh. OMG, Xiaomi has put negative-capacity battery at my phone!
Hahaha, Joking aside. That show us sometimes the reading can be off the chart. After I charge it to full, the charged capacity shows me around ~3900 mAh. Video tear down from various sources, also show the label 4000 mAh. There is no evidence to believe it is real 4000 mAh, unless we tear it down and test it by ourself. And even then, it doesn't guaranteed that our test is accurate, as other have pointed out. That is too much for most users out there. We got to believe what they give us.
A rule of thumb is compare the average SOT without gaming to another user. Then compare the average SOT of another phone with the similar spec (example Asus ZMPM1) and scale the battery capacity to the SOT achieved. Although battery consumption relies on so many factor, but the average should give a baseline. If it doesn't differ much, then we can hopefully believe the claim of capacity made.
I am getting around 10-12 hours of SOT with my usage (almost no gaming). Other users got almost similar average result, so this should point to the same average of 10 hours SOT. Some might get better, some might get worse, depends on their usage and many factors.
Click to expand...
Click to collapse
I get 7-8 SOT (not heavy usage). Should i open RMA?
Steve_max said:
You got 3600 mAh at 5V. This is 3600*5=18000 mWh or 18 Wh.
You battery stores 4000 mAh at 3.7V. This is 4000*3.7=14800 mWh or 14.8 Wh. Or: you fully charged your 4000 mAh battery and used 3.2Wh to keep your phone running during this time. No problems here.
Click to expand...
Click to collapse
Absolutely right. The capacity given is at the nominal voltage of Lithium Ion which sometimes gets calculated at 3.7V or 3.8V. Try to measure with a QC2.0 charger and see the voltage go up to about 9V ... your measured capacity will be even less then. The only way to get a good calculation of these things is like quoted. Take into account that the charger control IC probably also has a loss of 10 to 15% then our batts are not a scam at all.
Be happy with the redmi note 5 batt, my S7 stays in the drawer since I have this phone.
Ganapatya said:
I get 7-8 SOT (not heavy usage). Should i open RMA?
Click to expand...
Click to collapse
The are a lot of factors to consider. If you use your phone outdoor, the brightness might have been almost maximum all the time, this reduce SOT significantly. Bad signal also one of the battery killer. If you use mostly indoor, auto brightness with slider less than 50% and good signal; SOT 10 hours within 1,5 - 2 days should be easy. (no gaming, gaming also drain more battery). But if you use GPS a lot, outdoor, and bad signal, it is even possible to get only 5 hours SOT.
If you don't get the result considering all other factors are standard, you should check the wakelock, whether your phone is awake for most of the time.
I have moved to RR for about a week, and suddenly my SOT drop to half of usual. After quick check using BetterBatteryStat, it is Whatsapp accelerometer wakelock and play services significant motion wakelock. The key is if you open whatsapp and exit by pressing home (not back back until exit), it will lock the accelerometer and keep it awake till your battery die. The only way to prevent this wakelock is to exit properly using back button all the way till exit. I am still investigating this and haven't found a proper solution.
For play services, I have tried to clear data, but it still wakelock the sensor. Updated to 12.8.74, still wakelock. I know that the significant motion is used by the user activity API, but it should not wakelock like that. I ever use it to log the data using Automagic (when still in MIUI), but didn't get any permanent wakelock, battery life still good (10+ hours). But last night I tried to switch into airplane during sleep. Battery at 88%. Wake up in the morning, battery still at 88%! What? The night before, it will lose about 12-20 %. So the culprit is somewhere related to the network. Other reported that standby drain during sleep at night is only around 4-5%, so i must have something else causing the drain; as my signal are mostly 3-4 bars.
This confirms that the play services is using low power sensor. I see that the sensor only use 0,18 mA. So even used up for 10 hours, it only use 1,8 mAh (which is not even 1% - 40 mAh). Yeah, i excluded all other power consumption including the OS itself, but this simply tells that the wakelock is the culprit.
For whatsapp, it has been there since last year, but I wonder why I don't experienced it in MIUI. Probably MIUI have the way to supress the sensor usage or any other way. I have tried to change a lot of setting and permission, but the wakelock still there. Today, after updated RR to 20170723 build, the wakelock disappear, both whatsapp and play services. Maybe it is suspended or something else. I will continue to monitor what is going on.
For your case, it might be caused by any of the above or maybe something else. You have to check it first.
So I bought myself a decent USB multimeter (RuiDeng UM25C) because I was curious about my Mi 6 battery capacity after 20 months of everyday heavy usage.
I was avoiding charging to 100% all this time (max to 70%), only charging to full once a month maybe and never using a phone during charging. I also rarely discharged to less than 30%. The full charge counter in /sys/class/power_supply/bms/cycle_count is showing 642 full accumulated charge cycles, so quite a lot.
USB meter showed 14300 mWh after a full charge 0-100% (which is 110% of the original capacity 12900 mWh, impossible). So I did a search and found an article saying that Quick Charge 3.0 has around 90% charging efficiency.
So I made a quick mathematics and calculated that the battery should have taken in 14300 mAh x 90% = 12870 mAh (the rest of energy dissipated as a heat), which is basically new battery's capacity (which is again quite improbable, even with my special battery treating ).
My question is: is this calculation wrong? And if it is totally wrong - what should I count in additionally to get the more proper mWh estimation?
Thanks for any help