Database Users

Why does Android on the HD2 eat up so much battery

Hi Guys,
I was wondering why Android on HD2 eat up so much battery. Earlier I was thinking, that android is running of SD card...so its the case. However this is not true as in Android HD2 NAND thread its been mentioned many times...that battery won't increase significantly even after NAND install of Android, so where lies the problem...is it because power management drivers on hd2 android not good enough...just curious?
Regards

There must be a problem with your android build or you are not properly managing your battery life. To enjoy good battery life you need to disable radios via power control, and keep screen brightness low.
Current widget tells me that in standby my hd2 uses 3-7 mA. This draw is fine when compared to similar android devices.
Please provide some details on your build and your reading from current widget.

I think he was asking about how much the HD2 life in android is shorter when compared to WM6.X
If this is the case, this has much to do IMHO about how Android works in its innards.
The Android OS has a way of controlling the apps installed in it, to know which apps do which kind of stuff. Like, when a new app is installed it has a file that tells the OS all features it does, and which of those features can be called by other programs (an example is the gallery 3d, that can be used to open pictures of certain types, every time a file that it can open is accessed android asks [if you have more than one type of gallery] which app you want to use to open the picture).
With this kind of control being done by the system in real time in a way totally different from windows (register??) the OS probably need more awake time and probably use more battery.
With the same amount of time spent using similar stuff in windows mobile and android, WM really rulez in terms of Battery Life. BUT I really prefer the new life Android is giving me in HD2. I'm really happy again, feeling like I have a brand new toy again.
P.S: I'm oversimplifying the way this works, without even mentioning the services, widget services, and several other stuff that are running in the background all the time.

i get about the same battery life in winmo n androud. make sure u have a good radio n compatible rom.

mini_robot said:
i get about the same battery life in winmo n androud. make sure u have a good radio n compatible rom.
Click to expand...
Click to collapse
People always say those things...
Well, let me just say that I'm using one of the best combos out there, and yes I have tested almost all combos you can imagine by my self in my own phone, so I wouldn't rely on someone else's idea of a perfect combo.
Tested more than 10 roms (the list is long so, I wont bother saying all of them, but the most used ones are there, Chucky, Miri's, VBNrom, Dutty's, and several others.
About radio... 2.10, 2.11, 2.12 and now 2.14 I have used all of them too and combined them with each rom...
Right now the best combo FOR MY PHONE and in my opinion is VBN 3.14 and radio 2.14
Multi boot, autoboot android 6sec.
I really think that what is most important is the build, with the same builds, almost all WM roms made for android, and Miri, have the same effect for me, the radios I must say that 2.12 and 2.14 are the best, and 2.14 has better reception in my country, for me.
So, as I have said, FOR ME, the best combo is resumed to VBN 3.14, radio 2.14 and any android build, right now using Desire HD 3.1 from Mdeejay with several different kernells (still testing them)
The kernels and the build are the MOST important thing after you find a good combo.
With the best build/combo and a good WM rom, doing similar things (surfing the net for the same amount of time, phone in sleep mode for the same amount of time,same time talking and etc. the best battery life is surely for WM 6.X hands down.
BUT if you are really getting the same Bat life, you are a lucky guy keep the settings you have, because I must say that I have constantly near me 5 HD2 (from friends), all of them with android now, and every single guy says that the bat life is nowhere near WM 6.x
I could go a full day in WM6.5.3 and have 50-40% remaining in the end of a day with heavy usage. Android, with moderate to heavy use, I'm happy if I can reach the end of the day, and even happier with some bat left
Greetings, Santroph.

I agree battery life is not comparable to WM6.x. People who claim they get the same battery life most likely have a buggered up WM6.x setup or they don't know how to manage power/settings.

Which App are you using to monitor power consumption?
Currently I use PowerTutor.
One time I wondered how 30% of power were lost over night?!
So battery lasts maximum one day until it's empty.
On WM 6.5 it lasts for about 2 days, like santroph already said, too.
A friend of me told me, his HTC Desire has about 80% in the evening. Do they have a better battery?
In usage I have about 540-600mW
He has got 550-650mW
So seems the same power consumption.
Regards
----
HD2

I actually get around the same amount of battery life as well. Just running the stock Froyostone 2.1 without tweaks (don't even know how to do tweaks if my life depended on it). Current Widget shows 0mA when waken up from screen off and hovers at 3-4mA with screen on and idle. Battery drop 1-2% per hour over night.

polo735 said:
There must be a problem with your android build or you are not properly managing your battery life. To enjoy good battery life you need to disable radios via power control, and keep screen brightness low.
Current widget tells me that in standby my hd2 uses 3-7 mA. This draw is fine when compared to similar android devices.
Please provide some details on your build and your reading from current widget.
Click to expand...
Click to collapse
I have TMO US HD2 and I'm using NRGZ 21916 18Sep ROM with 2.14 radio. For android I'm using pongster's HyperDroidSense V1.1. I'm using only 2 widgets HTC Analog clock and Weather channel. I have set the screen brightness on automatic and to tell u its quite dull, not at all bright. I've also disabled all Background sync's and no WiFi or bluetooth is enabled...
I do like to fiddle with my phone every now and then...but its not heavy use, I would say its moderate.
Battery life i'm getting is by the end of day, the battery is drained and have to recharge.
Before this android ROM i tried warrenb213 CM6 9/6V1.5a which is claimed by some user's to give best battery life on TMO HD2. Its stock android rom with CyanogenMod...battery life was little better, but it was slow and it didn't had instant wakeup...it took 2-3 seconds after pressing the button to wake...and personally I prefer HTC Sense UI to stock...
On WinMo my phone easily last 2 days with some battery % (about 20-30) left and can easily give me third day too with light use on 3rd day. And by no means i'm using a minimalist WinMo setup...I have CHT v1.8.5 and the same analog clock with seconds hand enabled.
So battery life on Android << that on Winmo. About the argument that Android uses more battery due to how its build. I don't think its the reason, because HTC's other phone like Desire or Desire HD have the same 1230mAh battery and have similar specs...but there battery life is similar what HD2 gives on WinMo.

Also, you must bear in mind that comparing the HD2 to the desire with battery life, the desire is obviously going to win. The desire has been made by HTC to run Android, unlike the HD2. The desire does have a slightly larger battery (i think) but the desire has been optimized by HTC so that it uses the least amount of battery possible I.e when in standby etc.
I don't know all the specifics but this is what I've found out
Hope this helps
Sent from my HTC Desire using XDA App

^^ya, i do understand...but to me its happening like battery life on hd2 w/ android is like 15 hours from 7am in morning to 10pm in night....WinMo give easily gives like 50-60hours depending on use...desire has similar as i've heard...
Agreed not optimized, but I expect it to give 40hours with full charge?

It is not optimized I guess? I get 6-7 hrs on winmo but 5-6 on android.

We can't compare with Desire, even if the hardware are really similar when looking at CPU/GPU, RAM, radio and stuff like that, we have e HUGE NORMAL LCD screen, that really takes way much more battery than Desire's Smaller Amoled screen.
Recent tests have shown that the new desire with Super LCD (thats way better than ours) do waste more energy than the AMOLED one (despite what HTC has to say about it).
I think that we should compare it with our own phones with WM, and probably with the new Desire HD or Evo 4, which have the same Case/Screen and very similar hardware too (despite Evo beeing CDMA).
IMHO...
P.S: People say that the SD card doesn't have anything to do with the battery drain, and that nand should be the same. Well I can say that this IS and IS NOT true... It all depends on which card are you using. I have 4 MicroSD cards, and they all have different behavior with the same combo/build/kernel/battery, even when in sleep mode with everything else (connections and all) disabled.
I have used WatchDog to see if any program was strangely making this happen, and I didn't find anything at all different when the Hungry SDcard was using that much battery, it was all it's fault.
2GB class 4 -> 5-7ma stable
16gb class 2 -> 3-7ma stable
8gb class 2 -> 5-9ma stable
8gb class 6 -> 5-80ma not stable (can be ina 5-7ma for hours and suddenly be in more than one hour in 40-80ma)
I prefer to use the 16gb class 2 for more battery, since the performance is not that better with the class 6 in android.
I've tested this a lot, and retested.
Greetings, Santroph.

I think that the HD2 battery is shortened by the display (Samsung Vibrant is awesomer in that respect) as well as the processor. If I throttle the processor down to 384mhz and keep the screen at 33% (automatic backlit) then I can get pretty decent battery life from 15-24 hours?

Android on hd2 battery life

Hey guys. I'm a bit new to this, and I have a few questions. 1. Does having a faster microsdcard worsen the battery life of android running on an hd2? 2. With set CPU clocked back to 576 MHz Max 245 min, and all the settings toned back, I barely make it through a days use on my nexus one 2.2 build. Is this normal? Does battery vary greatly from build to build? Is there a build known for good battery life?
Sent from my Hd2 using XDA App

Android builds will always use much more power than WinMo, reverse engineering the drivers is not ideal nor efficient. Some builds use less power than others, best try a few with the current widget installed.
This is a thread on SD card power, I'm not sure it makes a huge difference. If you check the power usage app you will the OS is using 2 or 3 times the power that the screen is - this isn't good for battery life.

Hi lads, iam new to this myself I got my hd2 about 2 weeks ago and havnt had out of my hand since.. the only changes I have made was download hspl3 & flash radio 2.14 and I am currently running darkstones froyo 2.2 and I love it.. the only prob I had for my self was battery it was eating it.. when screen was off I was getting around 168ma and using phone was was up to about 600ma.. after about a week of searching I found out a few things and now I get a full day wit heavy usage. I downloaded setcpu,advanced task killer,green power free,changed a few settings on my phone and now I have a battery tats just as good as running WM.. ill get the exact settings up for u later if u want... hope it helps

after doing a task29, i loaded "vbn reloaded" (minimal winmo rom) ;
use EBL android loader and load mdeejay EvoSense 2.0 revolution ;
using "currentwidget" my battery usage is only 7mA idle with four email
accounts getting updated in the background.
Been using android as the (only) daily OS
z
ps just did a rm /data/system/batterystats.bin
need to see if it charges to "100%"
if only battery usage GOES DOWN WHILE ACTUALLY USING ANDROID,
that would be penultimate
(ultimate obviously is NAND boot )

skimask2006 said:
Hi lads, iam new to this myself I got my hd2 about 2 weeks ago and havnt had out of my hand since.. the only changes I have made was download hspl3 & flash radio 2.14 and I am currently running darkstones froyo 2.2 and I love it.. the only prob I had for my self was battery it was eating it.. when screen was off I was getting around 168ma and using phone was was up to about 600ma.. after about a week of searching I found out a few things and now I get a full day wit heavy usage. I downloaded setcpu,advanced task killer,green power free,changed a few settings on my phone and now I have a battery tats just as good as running WM.. ill get the exact settings up for u later if u want... hope it helps
Click to expand...
Click to collapse
I would love to know what your settings are, after 3 hours lite use i lost 45% battery, my gps is off and background update is also off....

2.12.50.xxxx radio.img
it has a lot to do with radi youre using, i found this one really good, have good bttery life, 3g, hdspa, wifi, gps, mms and all working really good...

Hello to all, iam using the android shubcraft version on my hd2 and i cant charge my device 100%. It stops on 85%. Did you guys have an idea??
Sent from my HTC HD2 using XDA App

I've been testing 2 different batteries fully charged with phone off. Using current widget they get the same readings about 7ma with screen off and average 200 on. One battery drains at about twice the rate of the other. Im pretty sure one is defective. I've cycled both to make sure. Also running on wm I get the same experience. If your lucky enough to catch a battery problem in the first 3 months of purchase from t-mobile they may send you another like they did for me.
Sent from my HTC HD2 using XDA App

heres a good thread on conditioning the battery
http://forum.xda-developers.com/showthread.php?t=827355
as far as sd card speed, a faster card will use less system rescources due to faster read/write speeds, ie: the cpu is under less load for a shorter period of time.
faster io performance = better battery life.
side note, underclocking to far will hurt battery life. this is due to it takeing longer to complete tasks. so if your like me and do a lot of turn the screen on, check some thing , turn it off, then the longer the screen's on the more your draining it.

[Q] NAND vs SD. MAGLDR vs CLK

Hi there,
I have been running SD Android builds for a couple of months, still a beginner. I'm happy with WinMo + Android SD build(s) ... however would we made any progress if we don't investigate further ...
Would NAND Android be any better than SD builds, specifically on Battery & speedness?
Would you recomend NAND vs SD?
MAGLDR OR CLK? What are the differences?
If I want to go back to WinMo ... would it be as easy as having the original stock rom (.nbh file) in a blank microSD and enter the boot loader?
If you still have energy after so many questions, one not as important (I can test myself) ... any ROM recommendation?
Many thanks to all those that make XDA-developers be XDA-developers
Pozi.

hey pozi,
I would recommend using NAND, it's a great experience. a TON better than winmo 6.5. I have great battery life, and the speed is as if the HD2 is an android device natively.
MAG vs cLK: I've tried both. The differences are:
cLK boots faster, and doesn't have a cmd prompt screen during boot.
cLK uses PPP for your data connection (MAGLDR uses rmnet). Sometimes you'll have a data drop that can only be fixed by rebooting your phone with PPP. rmnet is completely stable.
For NAND, to get back to winmo, you'll have to flash the official winmo6.5 ROM just as if you'd flash cLK or MAGLDR.
As for ROMs, it's totally up to your preferences. I've used a few, and currently I'm using TyphooN 3.6.0 because it has all the customization that I want. There are other kinds, you'll just need to test with a bunch to find what you like.

Panda_Face said:
I have great battery life
Click to expand...
Click to collapse
Thanks for your answer.
What does great battery life mean for you: 12h, 24h, 36h, 48h ... ?
In average, I'm just trying to have an idea compared to my 12h on SD.
THANKS AGAIN.
Pozi.

It depends on your setup:
What accounts are syncing, What apps are using background data,... you probably know the drill.
I use an app that disables my data usage and periodically re-enables it to sync with everything. So far my battery hasn't lasted any less than 13 hours.

Hi,
im used to flash the Boyppc's roms with cwr so on Nand after have handled a lot of builds on SD card. The battery life is great (2h of music, mail and internet 2-3h and others things with from a mobile so i use 60-70%) the speed is awesome and no problems if I need to remove the card from my phone.

I have tried many roms, I change every few months ... Until I find the "perfect" ROM...
I recommend NAND.
In my opinion it's faster, more stable and less problems.
Great battery life. With normal use you can enjoy almost a day of battery.(but if you use 3G the battery dies)
Right now I'm using the rom TyphooN_CM7_v3.6.0 MAGLDR, my favorite.

videira said:
I have tried many roms, I change every few months ... Until I find the "perfect" ROM...
I recommend NAND.
In my opinion it's faster, more stable and less problems.
Great battery life. With normal use you can enjoy almost a day of battery.(but if you use 3G the battery dies)
Right now I'm using the rom TyphooN_CM7_v3.6.0 MAGLDR, my favorite.
Click to expand...
Click to collapse
I'm using the sane ROM just with cLK, thats my favorite
Sent from my HTC HD2 using XDA App

===========================================

Yes definitely go for nand. Its so much smoother and faster than an SD build. I would imagine that android nand would conserve battery life vs. SD just because nand isn't going through so many processes to make your phone run.
Sent from my HD2 using XDA App

Heck, if you really want to save your battery turn on airplane mode. You'll go for days
Sent from my HTC HD2 using XDA App

I would also agree with the other posters that going with a NAND ROM gives you better battery life than an SD ROM. For me, my current NAND ROM has a standby battery drain of 2-5mA vs. my previous SD ROM with a standby battery drain of 7-9mA. I am currently using Tytung's Nexus HD2 v3.0 ROM. Very stable and fast. Everything is working very well. No force closes or drops in data. Market is very stable as well. Call quality is very clear and probably is one of the best that I have tried. I use MAGLDR since it is very easy to use, is very stable and compared to an SD ROM, is much faster to load from off. Try 45-50 seconds from off. If I remember, my SD ROM took almost 4-5 minutes to boot up from off.

As i have just readed the posts would say that your main problem is the BATTERY thing..right??
NAND is is the most stable , fast , battery saver , that you can offer to your phone..as all the people of xda writing above me ^^.
Now if you care about battery try finding a rom thats STABLE ...and not fancy with Effects and cool weather ,live wallpapers and many many other..try getting something stable - fast - and with no much bg programs to run....!

Thank you all.
I've gone to a NAND MAGLDR ROM and I'm VEEERY HAPPY ... at least now .
Already looking to the change rom process so that I can find the one that best suits me.
Thanks again,
Pozi.

pozi said:
Thank you all.
I've gone to a NAND MAGLDR ROM and I'm VEEERY HAPPY ... at least now .
Already looking to the change rom process so that I can find the one that best suits me.
Thanks again,
Pozi.
Click to expand...
Click to collapse
What kind of ROM are you looking for? We can help you narrow down your search.

Panda_Face said:
What kind of ROM are you looking for? We can help you narrow down your search.
Click to expand...
Click to collapse
Dayly use, so:
phone + bt + wifi + good responsiveness/overall speed (actually Speed IS important)
gps (not frequent but must work)
battery life (*)
HTC Sense or SPB Shell ready ... any other fancy launcher?
Good to have: navigate through PC's internet connection when USB connected (though saving battery due to not use WIFI and not use my little 3G data plan). Maybe this can be added with an .apk ?
Thanks Pozi.
(*) By the way Panda_Face I followed your suggestion of flight mode to save battery, it did work and saved a lot of battery

There is a "patch" of sorts for GPS which makes it connect a lot faster. It usually takes a few minutes to get any sort of lock from the satellites without it. (Click here to read about it).
I'd recommend either the TyphooN Cyanogenmod or the Nexus HD2. They are both very stable, and have all the latest and greatest stuff for them. They are also well known. Their forum pages have been viewed millions (not joking) of times, so there is a lot of support. And as far as I know they both have everything working (phone + bt + wifi) are very responsive.
To help with responsiveness use just a plain old normal wallpaper. The live ones --from what I've seen--- tend to lag the scrolling and flipping home screens and such.
I use an app called "JuiceDefender". The free version turns off my data connection (3g) and periodically turns it back on to sync with email, etc. The other paid versions of this have more options such as managing your wifi and other connections. This alone has doubled my battery life.
Hope this helps!

Currently on TyphooN Cyanogenmod ... will keep an eye on the Nexus.
Thanks.
Pozi.

i use a patriot class 10 SD card running AmeriCan Android, and it is uber fast.... has anyone ever compared the speed of a class 10 and NAND??? im really curious about this to decide if i want to use NAND or not... lol, i just dont know if it is worth it to redo everything for a little extra battery life... lols...

thomas.nelson4 said:
i use a patriot class 10 SD card running AmeriCan Android, and it is uber fast.... has anyone ever compared the speed of a class 10 and NAND??? im really curious about this to decide if i want to use NAND or not... lol, i just dont know if it is worth it to redo everything for a little extra battery life... lols...
Click to expand...
Click to collapse
Battery life is a plus. NAND is nice because it makes your phone feel now like a native android phone. Also you get to dedicate more space on your card for things. finally, you'll be getting rid of winmo 6.5 (worst operating system ever) it killed my first hd2; wouldn't boot one day.
Android NAND is the way to go
Sent from my HTC HD2 using XDA App

I would also agree with Panda_Face, Android NAND is the way to go. Very smooth and fast. Much less memory intensive. Gingerbread ROM that I am on used a zip file of slightly less than 90mB vs. my old HTC Sense ROM using 445mB of space. Both NAND ROMs were smooth and fast but going with the "lighter" Gingerbread ROM gave me a much faster boot up time. Less than half the time the HTC Sense ROM I used. Battery life is better on NAND vs. SD. Also, when I was using Android via SD, I never realized until I went NAND, how the SD ROM was not smooth when compared to the NAND ROM I am using now.

[Q] the best wp7 rom

what is the best wp 7.5 rom work withot problems on hd2 ?

i followed the advice in this thread, which was guided for TMOUS users:
http://forum.xda-developers.com/showthread.php?t=1327106
i installed Yuki v2 ROM with the 2.15 radio. Things have been going pretty smooth.

thanks dear
but my hd2 not t-mobile

Mine isnt either, but the WP7 rom works, Kinda awesomely infact, the only huge issue I get is the freaking battery life (Both 2.12 and 2.15 radios.)

Hey i just followed that guide and it was great. My battery life seems fine, but i have to put it in usb mode to charge. I still need to test it more though.
p.s.
Not tmobile either. I'm Australian Telstra

keller112 said:
Mine isnt either, but the WP7 rom works, Kinda awesomely infact, the only huge issue I get is the freaking battery life (Both 2.12 and 2.15 radios.)
Click to expand...
Click to collapse
Trail and error i guess, jus try different ROM and radios (SD cards too)
to far i tried Yuki V2 (smooth, and fast even data on 3g was fast) but battery drain is a killer, even with 2.12 radio
Pdaimatejam v2 - smooth, everything works, a lil issue with pinch and zoom (a little fiddley) bt batterylife is good, 10-16 hours on heavy use (2hours facebook, 200+txts, and whatsapp) [radio 2.12]
and HD20 v1.23b1 [radio 2.15] - smooth, everything works, battery drain over 3g on standby is amazing (over night only 5% battery drain) bt drains rapidly when on whatsapp and internet explorer.

When I use Windows (I prefer Android..) I use this one:
http://forum.xda-developers.com/showthread.php?t=1356833
Works fine, battery drain is high but that is the only issue.
Good luck!

Back to the future is good at multitouch and smooth but battery drain is so bad. For me, I need to last my battery using time much longer. 1 vote for 7740 v3 of Pdaimatejam.
Here is it http://forum.xda-developers.com/showthread.php?t=1356833
Version 3 still isn't uploaded, I'm using V3. Everything is smooth and fast as Back to future ROM, in addition, you'll get a better battery drainage(my battery isn't new but it run out in almost a day).
Sincerely
PhongPT

Looking for most clean rom, good performance and battery saving.

Hello,
I got my HD2 for about 2 weeks now and I tried almost al available roms (SD) and I really don't have any idea which one has the best overall performance. I know there are a lot of topics like this one and I also already searched trough the forum but all these topics are outdated. These are the ROMS I tried the most and for the longest time:
Nexus HD2 2.3.7 GingerBread (battery died in 4 hours)
DL Desire 4.31 (laggy and most of time not working)
FroyoStone Sense (less ram memory available, Sense is slow)
MCCM HD V6 (really drains battery)
IceCreamTostiDroid v10.0 (good rom but some games and apps are not compatible)
IceCreamTostiDroid v11.0 (same as ICTD 10.0)
RAFDROiD 4.2 (overall performance not so good, only 1200 Quadrant Benchm)
I would really appreciate a good advice. It's for daily use. And I don't really like big roms with all kinda themes...
greetz!

flashingst said:
Hello,
I got my HD2 for about 2 weeks now and I tried almost al available roms (SD) and I really don't have any idea which one has the best overall performance. I know there are a lot of topics like this one and I also already searched trough the forum but all these topics are outdated. These are the ROMS I tried the most and for the longest time:
Nexus HD2 2.3.7 GingerBread (battery died in 4 hours)
DL Desire 4.31 (laggy and most of time not working)
FroyoStone Sense (less ram memory available, Sense is slow)
MCCM HD V6 (really drains battery)
IceCreamTostiDroid v10.0 (good rom but some games and apps are not compatible)
IceCreamTostiDroid v11.0 (same as ICTD 10.0)
RAFDROiD 4.2 (overall performance not so good, only 1200 Quadrant Benchm)
I would really appreciate a good advice. It's for daily use. And I don't really like big roms with all kinda themes...
greetz!
Click to expand...
Click to collapse
If you want just SD build, then i would go with hyperdroid. Either CM7 or Gingerbread, battery life is phenomenal. Also, kernel builds will change your battery consumption too. So it may not always be your ROM. Also, there are things running in the background that you may not use, (for me it was google talk, maps, and LatinIME) i used startup manager to keep them from running at startup.

I can't really give you a specific ROM, but I can give you some advice.
First, if you really care about performance and speed, steer away from Sense.
I'd recommend MIUI for battery life, my phone used to last 3-4 days easily (a few phone calls and sms each day, network ON)
Cyanogenmod should be an option as well, it is fast and has a fair battery consumption rate.
However, the major factor is your usage of wireless networking/apps.
e.g. ,, Using 3G network will drink your battery far more than using 2G.
Keeping Bluetooth/WiFi on while not using them will also drain your battery.
Installing apps that require/keep background processes will drain your battery.
After all, it is up to you choosing a ROM.
HyperDroid is a good choice, Cm7 based, fast, dark-eye-candy, and low battery consumption