Battery levels decrease from 80% to 40% in 10 min

[Guest mr.a]

SO i had hungarian 2.1 installed on my phone and then flb-mob 5.1 but my bluetooth was not working.

so i decided to reinstall the orginal hunagry 2.1 update and then applied flb-mod again. This solved the issue with the

bluetooth but then my battery went from like around 80% to 40% with around 10 min Wifi usage.

Then i decided to do the nand restore (of the flb mod with which the bluetooth was not working but battery was excellet) but my battery

is still discharging very quickly.

help would be greatly appreciated

[Guest Azurren]

SO i had hungarian 2.1 installed on my phone and then flb-mob 5.1 but my bluetooth was not working.

so i decided to reinstall the orginal hunagry 2.1 update and then applied flb-mod again. This solved the issue with the

bluetooth but then my battery went from like around 80% to 40% with around 10 min Wifi usage.

Then i decided to do the nand restore (of the flb mod with which the bluetooth was not working but battery was excellet) but my battery

is still discharging very quickly.

help would be greatly appreciated

Think of it like this:

Think of the battery as a timer instead of a percentage. Say it says 3:00 hours of battery time left. It means 3 hours of life doing what it is doing (Idling, some syncing). As soon as you start-up wifi and keep the screen on the timer would reduce to say 1:20 hours. So it will last 80mins doing what you are doing now. Stop, and the battery meter will increase.

Now, back to the real world. The battery meter is not a timer and it certainly isn't programmed to do the above. It is just an annoying bug :)

So my guess is that you have been playing with your phone alot more since you installed the new mod :D

All with the above said I have noticed the phone getting very hot with FLB mod. May have something to do with it

If you really think this is the case re-flash the 2.1 update then the older FLB mod. See if it confirms your theory

[Guest Simon O]

Think of it like this:

Think of the battery as a timer instead of a percentage. Say it says 3:00 hours of battery time left. It means 3 hours of life doing what it is doing (Idling, some syncing). As soon as you start-up wifi and keep the screen on the timer would reduce to say 1:20 hours. So it will last 80mins doing what you are doing now. Stop, and the battery meter will increase.

Now, back to the real world. The battery meter is not a timer and it certainly isn't programmed to do the above. It is just an annoying bug :)

So my guess is that you have been playing with your phone alot more since you installed the new mod :D

All with the above said I have noticed the phone getting very hot with FLB mod. May have something to do with it

If you really think this is the case re-flash the 2.1 update then the older FLB mod. See if it confirms your theory

The only reason a phone would get hot is due to usage. If you are doing stuff that requires more CPU power then you will end up generating more heat. I recently found the reason why a lot of roms have incorrect CPU throttling which results in lower battery life. The 2.1 MCR and Zerosignull roms all suffer from this. It's a very simple fix though.

Inside the boot.img is a boot script which sets the cpu governator based on the phone type. This script reads the build.prop on /system and looks for the key "ro.product.device" and it's value. If this value does not match anything contained in it's script it forces the kernel to use a failsafe setting - less optimal settings which means the CPU isn't throttling as it should and will be using more power, resulting in lower battery life.

The fix. Set the 'ro.product.device' key in build.prop so the value is U8220, ie:

ro.product.device=U8220

most roms are based upon MCR which has this value set to 'Pulse'. There is no matching value in the kernel script so the kernel has no choice but to use a set of values predefined as a failsafe. Not ideal.

So make the change to your build.prop and reboot the phone. Unless a process requires the CPU to be running maximum load, you will find that it idles correctly and drops it's speed more often which will result in power savings.

Of course this doesn't solve the issue where Wi-Fi uses a fair bit of power anyway but with my phone I can quite happy use wifi on and off during the day and have enough battery life left after 24 hours.

Edited July 8, 2010 by flibblesan

[Guest Azurren]

I myself have noticed an increase in battery life with your FLB 2.1 mod.

I am now back on 1.5 and I can clearly see the difference :)

However, since being back on 1.5 my phone stays at room-temperature (Unless on charge and streaming a youtube video for 1 hour +)

Yet just browsing with the wifi switched on seems to heat up the device with 2.1

I am not saying it is a fault with the FLB mod but something with 2.1 causes the device to heat up considerably. And the amount of heat generated must use significantly more battery power. (With a 1500mah battery the pulse should last much longer than it does)

[Guest Dr Who]

I myself have noticed an increase in battery life with your FLB 2.1 mod.

I am now back on 1.5 and I can clearly see the difference :)

However, since being back on 1.5 my phone stays at room-temperature (Unless on charge and streaming a youtube video for 1 hour +)

Yet just browsing with the wifi switched on seems to heat up the device with 2.1

I am not saying it is a fault with the FLB mod but something with 2.1 causes the device to heat up considerably. And the amount of heat generated must use significantly more battery power. (With a 1500mah battery the pulse should last much longer than it does)

My battery was completely random on 1.5 - some days I could go all day and only use maybe 10-20% power, other days it would die by 6pm. No different use. My feeling was that the Handcent app I installed was a problem, as was servosearch. Moved to the Swedish 2.1 ROM and battery life is amazing - even hammering it I get two days, would probably get three but its now so usable that I use it instead of firing up my laptop at night.