[Q] What is this for kind of kernel module?

Destroyedbeauty · Mar 2, 2014

I did some checking in the /sys folders on my Z1 and found this file called "fake_battery" and a value of -22..

What is this parameter related file doing actually for our Z1 phones?

I created an init.d script that echoed an 0 command on that fake_battery file and rapid battery drain issues after full charge did disappear..

EDIT: If someone wants to try this init.d script just for confirm that this isn't any placebo effect - I can upload it here!

Sent from my C6903 using XDA Premium 4 mobile app

harfot · Mar 2, 2014

Destroyedbeauty said:
I did some checking in the /sys folders on my Z1 and found this file called "fake_battery" and a value of -22..

What is this parameter related file doing actually for our Z1 phones?

I created an init.d script that echoed an 0 command on that fake_battery file and rapid battery drain issues after full charge did disappear..

EDIT: If someone wants to try this init.d script just for confirm that this isn't any placebo effect - I can upload it here!

Sent from my C6903 using XDA Premium 4 mobile app

No such file - what have you been playing around with

Destroyedbeauty · Mar 2, 2014

harfot said:
No such file - what have you been playing around with

Found this on advanced stock kernel.. Should then be on stock also.. Very confusing, but I've not played with anything because this is inside the kernel / driver related folders and I am not into kernel hacking..

Sure u looked in the right folder?

Sent from my SGP311 using XDA Premium 4 mobile app

harfot · Mar 5, 2014

Destroyedbeauty said:
Found this on advanced stock kernel.. Should then be on stock also.. Very confusing, but I've not played with anything because this is inside the kernel / driver related folders and I am not into kernel hacking..

Sure u looked in the right folder?

Sent from my SGP311 using XDA Premium 4 mobile app

Found it, but maybe this https://github.com/openwebos/nyx-modules/blob/master/src/rockhopper/battery/emulator/fake_battery.c gives a clue

Destroyedbeauty · Mar 5, 2014

harfot said:
Found it, but maybe this https://github.com/openwebos/nyx-modules/blob/master/src/rockhopper/battery/emulator/fake_battery.c gives a clue

Any clue or suggestion why it is echoed -22 as pre-configured? What does this file even do?

Your link didn't make anything more clear on this one..

cippi21 · Mar 5, 2014

In no expert but maybe there are a set of commands used by android with non stock or "fake" batterys...that's what I understood from the link harfot provided...again I'm no expert just my 2 cents haha

Sent from my C6903 using Tapatalk

harfot · Mar 5, 2014

Destroyedbeauty said:
Any clue or suggestion why it is echoed -22 as pre-configured? What does this file even do?

Your link didn't make anything more clear on this one..

cippi21 said:
In no expert but maybe there are a set of commands used by android with non stock or "fake" batterys...that's what I understood from the link harfot provided...again I'm no expert just my 2 cents haha

Sent from my C6903 using Tapatalk

I think you are quite right - almost every (not to say all) manufacturers use a higher Amps level for charging their own (known) batteries opposed to unknown (fake) batteries which for security reasons are charged at a lower level.

Destroyedbeauty · Mar 5, 2014

harfot said:
I think you are quite right - almost every (not to say all) manufacturers use a higher Amps level for charging their own (known) batteries opposed to unknown (fake) batteries which for security reasons are charged at a lower level.

Well, using an ' echo 0 ' command on the fakebattery file solved my rapid battery drain behaviour, so maybe something was causing misreadings of the actual battery gauge level with pre-configured "-22" value. Before, my drain started to act normal when at 75-78% procentage left, now it is normal drain..

harfot · Mar 6, 2014

Destroyedbeauty said:
Well, using an ' echo 0 ' command on the fakebattery file solved my rapid battery drain behaviour, so maybe something was causing misreadings of the actual battery gauge level with pre-configured "-22" value. Before, my drain started to act normal when at 75-78% procentage left, now it is normal drain..

Rebooting changes value back to "-22" (without any scripts) but "0" value don't seem to change when connecting to USB or Sony charger (don't have any other supply at hand right now).

Destroyedbeauty · Mar 6, 2014

harfot said:
Rebooting changes value back to "-22" (without any scripts) but "0" value don't seem to change when connecting to USB or Sony charger (don't have any other supply at hand right now).

Use init.d script and it will stay at 0 forever!

Sent from my SGP311 using XDA Premium 4 mobile app

harfot · Mar 6, 2014

Destroyedbeauty said:
Use init.d script and it will stay at 0 forever!

Sent from my SGP311 using XDA Premium 4 mobile app

Tried it with an iPhone supply - value returns to "-22"

Destroyedbeauty · Mar 6, 2014

harfot said:
Tried it with an iPhone supply - value returns to "-22"

Have u gived the script proper permissions?

harfot · Mar 6, 2014

Destroyedbeauty said:
Have u gived the script proper permissions?

Not using script at the moment - curious to find out whether other values would show up.

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