Develop Bugs

Battery driver modification

Friends,
Is there any way to build a battery driver which calculate battery percentage according to battery voltage.
I my defy battery level indicates full when it reaches 4184 mv and shows 99% / 4130 mv after disconnecting the charger. Phone shutdown itself when it reaches around 3600 mv. So the voltage variation is 530mv.
If we give 4130 mv and above as 100% and every 5.3mv decrease in voltage will reduce 1% battery level.
Ex:- 4130mv = 100%, 4125mv= 99%, 4120mv = 98% ..........4000mv = 75%,............3600mv = 1%.
I am not a developer, so i am just presenting this idea in this forum. Don't know if it work or not.
But if it works i hope the battery drops will reduce.
Thanks for reading this topic and sorry for my bad English
Sent from my MB525 using Tapatalk 2

AW: Battery driver modification
pradeeppk said:
Friends,
Is there any way to build a battery driver which calculate battery percentage according to battery voltage.
I my defy battery level indicates full when it reaches 4184 mv and shows 99% / 4130 mv after disconnecting the charger. Phone shutdown itself when it reaches around 3600 mv. So the voltage variation is 530mv.
If we give 4130 mv and above as 100% and every 5.3mv decrease in voltage will reduce 1% battery level.
Ex:- 4130mv = 100%, 4125mv= 99%, 4120mv = 98% ..........4000mv = 75%,............3600mv = 1%.
I am not a developer, so i am just presenting this idea in this forum. Don't know if it work or not.
But if it works i hope the battery drops will reduce.
Thanks for reading this topic and sorry for my bad English
Sent from my MB525 using Tapatalk 2
Click to expand...
Click to collapse
if u look in quarx github he had a custom battd demon which calculate with extra files a better result. but battery drops are a combination of damage battery and a bad sensor for the batterylevel in the defy... thanks moto... in the newest CM10 builds the demon is integrated.

Any rom for better battery life?

Guys im on pure nexus rom with elementalx rom... Im using deb lte version.
Currently im only getting 4.5hrs of screen on time.. Can anyone suggest mea rom has good SOT?
Sent from my Nexus 7 using XDA-Developers mobile app

1Ishara said:
Guys im on pure nexus rom with elementalx rom
Click to expand...
Click to collapse
The ROM and kernel are already battery-efficient. Let's check your battery, run adb shell dmesg > dmesg and attach dmesg here or copy from it the following lines:
Code:
bq27541_get_psp charge_full = ...?
bq27541_get_psp charge_design = ...?
bq27541_get_psp cycle count = ...?

k23m said:
The ROM and kernel are already battery-efficient. Let's check your battery, run adb shell dmesg > dmesg and attach dmesg here or copy from it the following lines:
Code:
bq27541_get_psp charge_full = ...?
bq27541_get_psp charge_design = ...?
bq27541_get_psp cycle count = ...?
Click to expand...
Click to collapse
I didn't post this thread, but could you look at my values?
My Nexus 7 (2013) can boot to fastboot/recovery while plugged into USB or unplugged, but can only boot to Android when plugged into AC. I've tried the current 6.0.1 and 4.4.4 factory images, same with both. I used TWRP to get access to ADB. Unless it's plugged into AC it just shows 'Google' and sometimes the beginning of the boot animation and then shuts off when trying to boot to system. Leaving it plugged into AC boots fine.
Code:
~ # dmesg | grep bq27541_get_psp
<5>[ 1.327697] bq27541_get_psp status: Not charging ret= 0x0200
<5>[ 1.328796] bq27541_get_psp voltage_now= 4228000 uV
<5>[ 1.330841] bq27541_get_psp temperature= 278 (0.1óXC)
<5>[ 1.331817] bq27541_get_psp current_now = -21 mA
<5>[ 1.332794] bq27541_get_psp charge_now (compensated) = 3441000 uAh
<5>[ 1.333862] bq27541_get_psp charge_avg (uncompensated) = 3516000 uAh
[B]<5>[ 1.334869] bq27541_get_psp charge_full = 3441000 uAh
<5>[ 1.335906] bq27541_get_psp charge_design = 3830000 uAh[/B]
<5>[ 1.336914] bq27541_get_psp energy_now = 12998000 uWh
<5>[ 1.338073] bq27541_get_psp charge_counter = -8000 uWh
<5>[ 1.339080] bq27541_get_psp power_now = -89000 uW
[B]<5>[ 1.340148] bq27541_get_psp cycle count = 7[/B]
[.....]
<5>[ 3.681732] bq27541_get_psp status: Full ret= 0x0200
<5>[ 3.682739] bq27541_get_psp voltage_now= 4023000 uV
<5>[ 3.686248] bq27541_get_psp current_now = 0 mA
<5>[ 3.687255] bq27541_get_psp charge_now (compensated) = 3441000 uAh
<5>[ 3.688079] bq27541_get_psp temperature= 278 (0.1óXC)
<5>[ 3.689086] bq27541_get_psp charge_avg (uncompensated) = 3516000 uAh
<5>[ 3.689941] bq27541_get_psp charge_full = 3441000 uAh
<5>[ 3.690917] bq27541_get_psp charge_design = 3830000 uAh
<5>[ 3.691772] bq27541_get_psp status: Full ret= 0x0200
<5>[ 3.692749] bq27541_get_psp energy_now = 12998000 uWh
<5>[ 3.693603] bq27541_get_psp charge_counter = -8000 uWh
<5>[ 3.694580] bq27541_get_psp power_now = 0 uW
<5>[ 3.695404] bq27541_get_psp cycle count = 7
I'm not seeing anything there that looks wrong... but I don't know why it doesn't run without AC.
Thanks

Oishikatta said:
I didn't post this thread, but could you look at my values?
Click to expand...
Click to collapse
I hope the OP does not mind.
fully recharge
boot Android with AC on
disconnect AC
keep display on - turn off sleep
What is SOT on your N7?

From the looks of it tour charger isn't providing enough current while your nexus is using more then the charger can provide so ultimately your battery keeps on falling. Try using a new USB cable and look the the charger adapter that it should be 1.5A to 2A.

htb2050 said:
From the looks of it tour charger isn't providing enough current while your nexus is using more then the charger can provide so ultimately your battery keeps on falling. Try using a new USB cable and look the the charger adapter that it should be 1.5A to 2A.
Click to expand...
Click to collapse
Is it because of the near-zero "current_now"? But this can indicate a PC-USB2 port delivering typical <500mA, and indeed the user logged it on ADB from a PC.
Also, the user reports "leaving it plugged into AC boots fine" so the charger/cable can definitely supply 1A+ required during boot up.
Finally, considering "cycle count = 7" there are 3 options:
brand new tablet
old but hardly used
always AC connected
I'd say #3 because "it doesn't run without AC" and even the worst charger/cable can over time eventually fully recharge it.
I intended to comment on the logs when also SOT is provided but I have already concluded that the battery is finished. Note the incredible 4.2V to 4.0V drop within 2 seconds at the same current!

k23m said:
Is it because of the near-zero "current_now"? But this can indicate a PC-USB2 port delivering typical <500mA, and indeed the user logged it on ADB from a PC.
Also, the user reports "leaving it plugged into AC boots fine" so the charger/cable can definitely supply 1A+ required during boot up.
Finally, considering "cycle count = 7" there are 3 options:
brand new tablet
old but hardly used
always AC connected
I'd say #3 because "it doesn't run without AC" and even the worst charger/cable can over time eventually fully recharge it.
I intended to comment on the logs when also SOT is provided but I have already concluded that the battery is finished. Note the incredible 4.2V to 4.0V drop within 2 seconds at the same current!
Click to expand...
Click to collapse
SOT after leaving it charging for a while is about 65 seconds. If I plug it back into AC and boot it's still showing 100%, but only lasts ~1.5s after unplugging again.
I got it in 2014 but didn't use it much.
So looks like nothing to do for it then but replace the battery?
Thanks for the help.

Tested my phone with an ammeter 0%-100% = 1280 mAh??

Surely this can't be right? The phone is supposed to have a 2600 mAh battery.
Is there any other way I can test the capacity of the battery as I can't rule out a faulty ammeter.
I used a quick charge 2.0 charger and it reached 70% after 45 minutes with a reading of 800 mAh on the ammeter.
I'm bamboozled by this.

Heavy Battery Drain

I use Havoc OS 2.9(rooted). I bought a fast charger (Output 2.5A/9V = 2A/ 12V=1.5A) just yesterday. It charges from 50 to 70 in about 10 minutes.
I charged it from 30 to 65 before sleeping. And when I woke up, the battery had drained 15 % in 7.5 hours.
What can be done to avoid these battery drains?

Is there any way to check the battery charge cycles (no root)?

I was trying *#0228# secret code and Phone INFO ★SAM★ app without success.

Here is the output of the dumpsys battery command:
Code:
Current Battery Service state:
AC powered: false
USB powered: true
Wireless powered: false
Max charging current: 0
Max charging voltage: 0
Charge counter: 7300000
status: 2
health: 2
present: true
level: 52
scale: 100
voltage: 3890
temperature: 232
technology: Li-ion
batteryMiscEvent: 0
batteryCurrentEvent: 0
mSecPlugTypeSummary: 2
LED Charging: true
LED Low Battery: true
current now: 293
charge counter: 7300000
Adaptive Fast Charging Settings: true
Super Fast Charging Settings: false
USE_FAKE_BATTERY: false
FEATURE_WIRELESS_FAST_CHARGER_CONTROL: false
mWasUsedWirelessFastChargerPreviously: false
mWirelessFastChargingSettingsEnable: true
LLB CAL:
LLB MAN:
FEATURE_HICCUP_CONTROL: true
FEATURE_SUPPORTED_DAILY_BOARD: true
SEC_FEATURE_USE_WIRELESS_POWER_SHARING: false
BatteryInfoBackUp
mSavedBatteryAsoc: -1
mSavedBatteryMaxTemp: 522
mSavedBatteryMaxCurrent: 2811
mSavedBatteryUsage: 4013
FEATURE_SAVE_BATTERY_CYCLE: true
SEC_FEATURE_PREVENT_SWELLING: true
Do you know what mSavedBatteryUsage is?