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?

Battery - Android using 50%+

I'm using Mdeejay rEVOlution 2.3 ROM. 'Android System' is using 58% of my battery, Chucky lite ROM with most of the WM settings off, and Hastarin Kernel (can't remember which number). Is this right?

No, usually Display takes most of the battery. Might be a bad build or something, you might want to format your SD card and load a new version of android on it.
Luckych

Cheers for the reply! I guess I'll crack on with it. Good job it's a Sunday, hey?

i have installed android for the first time yesterday. this is all new to me (flashing roms and stuff) but it all went ok. i have though noticed that battery life is poor. Firstly, i have searched the forum and noted that many users are stating what the battery usage is in mA. how exactly is this measured? is there an app? secondly, it appears the battery can be effected by what rom, radio etc is installed. if i was to try a different rom or radio, would i have to install android again along with all my apps?
thanks

i kind of have this problem too but it hink thats just how these early builds are.
Use currentwidget to measure mA.
My mA idle get down t 5mA, but I am still having some issues getting battery life that i think is acceptable

GeoMil said:
i kind of have this problem too but it hink thats just how these early builds are.
Use currentwidget to measure mA.
My mA idle get down t 5mA, but I am still having some issues getting battery life that i think is acceptable
Click to expand...
Click to collapse
thanks for that. just tried the widget. lowest i get is 7mA

5 to 9 mA is great battery consumption at idle, I'm having an issue staying there, I bottom out one day at 3mA but then today my phone doesn't drop below 50mA at idle. Windows Rom and radios are important for it to run smoothly but I don't think a lite rom makes a difference over a full rom, when haret launches , is gonna keep anything from running on windows(so I hear) I've tried many many roms, and the vbn rom, which is a super lite rom, didn't perform better than what I'm using right now which is energy cht. Radio will keep you from having issues with the phone waking up,(bsod) I've tried a bunch of radios and settled with the 2.15, a lot of people swear by it!

WP7 Battery Drainage Vs. Radio Rom

WP7 Battery Drainage Vs. Radio Rom:
After searching in Forums, I Found that most of us (WP7_HD2 Owners ) have a great issue with battery drainage.
I also found that some of us tested radio roms and found that it affects the drainage directly but not the same way the same version did on WM6.5.x
SO I wanted to create this forum to brain storm and try several radios and check what is the best for our Beloved HD2
I will post and edit the best radios based on your reviews so more you post results more we will get clearer image of what's optimum:
So Based on what we experience ; Radios are sorted Best on top:
1- Radio 2.12.50.02_2
2- Radio 2.14.50.04
3- Radio 2.15.50.14
I know it depends on your network provider also, but At the end it's kind of trial and error forum, we get help from each other: there is nothing certain 100 %.
Rest will follow...

gsidhom said:
WP7 Battery Drainage Vs. Radio Rom:
After searching in Forums, I Found that most of us (WP7_HD2 Owners ) have a great issue with battery drainage.
I also found that some of us tested radio roms and found that it affects the drainage directly but not the same way the same version did on WM6.5.x
SO I wanted to create this forum to brain storm and try several radios and check what is the best for our Beloved HD2
I will post and edit the best radios based on your reviews so more you post results more we will get clearer image of what's optimum:
So Based on what I read on other forums as starting; Radios are sorted Best on top:
1- Radio 2.14.50.04
2- Radio 2.15.50.14
Rest will follow...
Click to expand...
Click to collapse
Maybe radio 2.12.xx.xx should be tested also. It is a 576mb enabled radio also.

i've tried 3 radios so far
2.12 is the best, and 2.14 and 2.15 are very similar
i am testing 2.10 now
im using htc hd2 t8585, not tmous

i am using the 2.15,,works normally,, not bad,,but neither remarkable.

Managed to pull 30 hours until recharge with moderate usage on 2.12.50.02-2 radio. UK Virgin mobile' s best radio I might say when it comes to batery drainage.
Sent from my HD7 T9292 using Board Express

I have radio as 2.14. Would like to know whether the radio 2.12 is better ?

Wrong forum, this is is development not Q&A/General

Doesn't location also have to be taken into account? I understood that a radio that gives great performance in the UK could be terrible elsewhere and vice versa.
I'm not suggesting that this thread isn't a decent idea, just that users should also post their country of use.

I tried WP7 with radio version 2.15.50.14, the battery lasts two days, vs windows mobile 6.5, 5 days.
But my opinion is that the problem is a bug that allows the use of gprs/3g link cause some sort of continuous, although the 3G connection is switched off.

Im using Radio 2.12.50.02_2 simply because I seem to get a better signal with it. Ive not noticed much difference in the battery life than when I was using Radio 2.15.50.4

Just added it here because it discuss the topics mainly accessible through development, and want most of us to reach it....

I have switched from radio 2.15 to 2.14. and I see improvement in battery life

Sorry if this is a bit off topic but it's just something I experienced that might be found useful....or I may have a freaky battery
Could the problem with the battery drainage could be related to the battery state when WP7 was installed?
I installed it on my device when the battery was half charged and I was only getting 1/2 a days use before it died. When recharged under WP7 it would take 1hr and only last another 1/2 day...but.........I installed android and am now dual booting WP7 and Android.
I ran the battery out using Android and recharged it under Android to 100% charge. Since doing this WP7 takes 2 hrs to charge instead of 1hr but the battery lasts all day with between 5%-15% remaining after 12 hours.
Maybe WP7 checks the battery state on install and assumes its fully charged when the device (HD2) is first powered on and incorrectly calculates the maximum charge!?
Just a thought.

welki1979 said:
Sorry if this is a bit off topic but it's just something I experienced that might be found useful....or I may have a freaky battery
Could the problem with the battery drainage could be related to the battery state when WP7 was installed?
I installed it on my device when the battery was half charged and I was only getting 1/2 a days use before it died. When recharged under WP7 it would take 1hr and only last another 1/2 day...but.........I installed android and am now dual booting WP7 and Android.
I ran the battery out using Android and recharged it under Android to 100% charge. Since doing this WP7 takes 2 hrs to charge instead of 1hr but the battery lasts all day with between 5%-15% remaining after 12 hours.
Maybe WP7 checks the battery state on install and assumes its fully charged when the device (HD2) is first powered on and incorrectly calculates the maximum charge!?
Just a thought.
Click to expand...
Click to collapse
I believe you are right. For the first time did y HD2 chage under wp7 and i noticed that the battery did not last half a day. I usually charge my batteries through an external phone battery charger (have 3 batterie which i rotate).

I am trying 2.14 in London Uk. So far better than 2.15. Will try 2.12. I remember there was one radio in particular that was FAB for battery life but so so for reception. I will try to find out which because for me battery life is more important. Could have have been evem 2.12. Will have to search the other forums.

welki1979 said:
Sorry if this is a bit off topic but it's just something I experienced that might be found useful....or I may have a freaky battery
Could the problem with the battery drainage could be related to the battery state when WP7 was installed?
I installed it on my device when the battery was half charged and I was only getting 1/2 a days use before it died. When recharged under WP7 it would take 1hr and only last another 1/2 day...but.........I installed android and am now dual booting WP7 and Android.
I ran the battery out using Android and recharged it under Android to 100% charge. Since doing this WP7 takes 2 hrs to charge instead of 1hr but the battery lasts all day with between 5%-15% remaining after 12 hours.
Maybe WP7 checks the battery state on install and assumes its fully charged when the device (HD2) is first powered on and incorrectly calculates the maximum charge!?
Just a thought.
Click to expand...
Click to collapse
You might be on to something here! I charged my phone to full capacity while downloading and waiting to install WP7 and my battery had been good. I even believed that it holds better than with android builds on NAND or SD. Lets investigate this, please.

Radio 2075027_2
Ok I managed to find the radio that gave me excellent battery life under Windows 6.5 rom = Radio 2075027_2. I reasearched my old posts in another forum.
I have installed it fine and will test out over the next couple of days and report back.
If anyone else wants to try, the radio is in link below:
www.4shared.com/file/hIq2kMVF/Leo_Radio_2075027_2.html

abbas said:
You might be on to something here! I charged my phone to full capacity while downloading and waiting to install WP7 and my battery had been good. I even believed that it holds better than with android builds on NAND or SD. Lets investigate this, please.
Click to expand...
Click to collapse
Same here, I've charged fully my battery before reinstalling WP7 and I'm on my second day without charging, thos I'll have to do so in a few.

tboy2000 said:
Ok I managed to find the radio that gave me excellent battery life under Windows 6.5 rom = Radio 2075027_2. I reasearched my old posts in another forum.
I have installed it fine and will test out over the next couple of days and report back.
If anyone else wants to try, the radio is in link below:
www.4shared.com/file/hIq2kMVF/Leo_Radio_2075027_2.html
Click to expand...
Click to collapse
Remember, just a warning for everyone.
If you use a 2.07, you want be able to boot into Android (if you dual boot using MAGLDR SD card).
Android needs 2.08 and up.

i tested 2.10
it is a little bit inferior than 2.12 =) but it is still great

Battery again...

I'm on Twilight DFC ( last version with htc hub )
Rom use : 2.14.50
HSPL : 2.08
card SD : micro SD sandisk 4Go class 4
Magldr : 1.3
Use : no really ( check my mails every 3 hours , 20 sms per day , little internet with 3g.
Désactivated : my 3g, wifi, localisation for a better battery level. My emails are checking just every hour by option.
Results : 100% at 8 A.m , 20% at 7 P.m ...
The battery are very drain...
with rom 2.15.50 it is the same
rom i have use : xmob 1.3 / 1.4 , moonlight ... and.. it is the same problem.
Please help me .

Same issue here. It's about 60mA battery drain, guess something wrong in power management.

You've most likely forgot to disable bluetooth completley. There is a 60mA BT bug in some roms.

bluetooth is off, but the battery running time is still bad. What Radio Rom is definitely the best ?

How to completely turn off bluetooth? It was turned off in settings

Yes, Settings/Bluetooth disable

jenzy1985 said:
bluetooth is off, but the battery running time is still bad. What Radio Rom is definitely the best ?
Click to expand...
Click to collapse
2.12.50 with the battery tweak found in the development subforum gives me over a day with moderate to heavy usage (games, 3G internet, 3 e-mail [email protected] min, 30 min. voice calls). In standby (only mail sync on) I get 10-12% battery drop over the night.
Wait for a few recharge cycles and it will settle. At first I got 12-15 hrs. After 2 weeks it got MUCH better.

is your batter being charged propperly?
The battery tweak sets the full level for the battery.
you must first charge the battery to its maximum level then run the reg tweak
Now here is the problem, WP7 on our HD2 will not charge the full batter all of the time. Quite often you must charge until it goes green, then reboot and charge so more, keep repeating until the HTC battery tool reports the ACR level roughly the same as the FULL level.
to give you an idea
Ive just charged my phone over night, it says its full, it wont charge any more but the tool reports it only half full, even though the indicator shows full. But my battery life will drop like a rock and may report being empty when its not.
If i restart my phone just now the tool shows a jump in ACR value to about 800mAh it then allows me to charge the remaining 400mAh.
or you might find that restarting it shows the battery is full in both indicator and ACR value
The point is, after a full charge, restart the phone because until you do the phone doesnt appear to know whats goig on wth the battery, im guessing this is something to do with the fact that the HD7 and HD2 DO have some small differences inside.

I think what frustrates me more than anything else is the sheer unpredictability of my battery performance. I have done all the tweaks and installed the battery tool but overnight in the past week I have seen the battery go down as low as about 15-20% and remain as high as 80% with a range in between (estimated values, of course).
I'm now going to try to look at my data usage to see if anything is causing the radio to work extra hard some nights and not on others.
If it was at least consistent I could then start thinking about Radio versions, management strategies and the like but while it's so variable it a bit hard to get scientific with it...!

indeed it is a bit of a pain but remember we were never ment to have this ROM.
remember though it might be unpredictable because its not full, its not as easy as it sems to get a full charge, even when htc battery tool and MS tells us its full it might not be, persistant restart and charge usually gets it done

It is definitely battery problem exists! Don't try to hide it because all that stuff you are talking here to solve that is not working! Test in 2G network without any BT and WiFi during 24h failed, battery completely drained without reason.

no one is saying there isnt a problem, there are seveal problems
The big one is you shouldnt have WP7 on your HD2, our device was not supported, you cant say the HTC HD7 is the same because it is not, largely it is yes, but internally it has differences, one of these differences seem to be the controler for the battery
To be clear, WP7 cant report the correct battery level without tweaking it, and in some instances WP7 will not completely charge your phone but it may appear full there by leading to quick battery drainage

I second that. I think it's the matter of hit and miss. I have two hd2s, and one of them has ****e battery life. Both are using the same rom, same radio, same battery optimisation technique btw.

I bought an HD7 cause of the battery drainage of WP7 HD2, multi touching, downloading from market e.t.c!
I know HD2 is better than HD7 because you can have everything but... WP7 is my thing ya know??? So if you guys liked WP7 just go out there and buy your selves an official WP7 device! Believe me i l.o.v.e it and i will stick with it!
Battery life on HD7 is stunning! I have it running 3 days now and now i have 20% with moderate use..

arkatis said:
I bought an HD7 cause of the battery drainage of WP7 HD2, multi touching, downloading from market e.t.c!
I know HD2 is better than HD7 because you can have everything but... WP7 is my thing ya know??? So if you guys liked WP7 just go out there and buy your selves an official WP7 device! Believe me i l.o.v.e it and i will stick with it!
Battery life on HD7 is stunning! I have it running 3 days now and now i have 20% with moderate use..
Click to expand...
Click to collapse
Worse recommendation I ever saw. When first android port was released, there was huge battery drainage too but now I'm using android on my HD2 with 3 days batt life and I didn't buy new android device. So it can be fixed without wasting money.

In my opinion..Android is boring.. I know that battery life on Android HD2 is awesome but the OS is very Boring... When i flashed WP7 i said "this will be my daily OS" (i love simplicity..)... At that time i needed to charge my battery daily and i was a little bored of the hard keys and battery and stuff like that! (also i had some lost pixels on the screen) Didn't wanted to go back to Android though! So why do i have to keep my boring HD2??? Since i wanted to run WP7 as a daily OS i got my new HD7 (for 150Euro)
I am Just telling my opinion and i hope you agree with me...
I am a tech lover guy...Yesterday was iPhone, after that HD2,today HD7 and God knows what else for tomorrow!

where to get an hd7 for 150,- euro????? i'll going out and get two of them, too

for me wp7 is boring until now. almost no customization.. when you want to turn off data or wifi or bt you have to navigate through 2 or 3 menus.
and it is slow even though there are beautiful animations. (contacts open in about 2 seconds and in android it is about 0,5 seconds)
i am all for simplicity as long as you have all functions and speed.
btw battery is enough for 1 day with moderate use but forget using it from early morning and a long partynight
(camera issue still a bummer)

im all up for opinions on here....so ill give me own
Im sorry but i have not seen a more fluid and resposive device then the HD2 with WP7, iphone, android on various models even WP7 on other devices dont appear as quick as mine but thats the luck of the draw with using our HD2 some folk have had issues others think its amazing. contacts for me, around 200ish load instantly
luck of the draw
battery life is a concern still as is the camera other than that all is good

arkatis said:
In my opinion..Android is boring.. I know that battery life on Android HD2 is awesome but the OS is very Boring... When i flashed WP7 i said "this will be my daily OS" (i love simplicity..)... At that time i needed to charge my battery daily and i was a little bored of the hard keys and battery and stuff like that! (also i had some lost pixels on the screen) Didn't wanted to go back to Android though! So why do i have to keep my boring HD2??? Since i wanted to run WP7 as a daily OS i got my new HD7 (for 150Euro)
I am Just telling my opinion and i hope you agree with me...
I am a tech lover guy...Yesterday was iPhone, after that HD2,today HD7 and God knows what else for tomorrow!
Click to expand...
Click to collapse
I'm not agree. You didn't notice that "super simple" WM7 consuming more energy than "boring" android? And what a point of this?
You know what, rich people always bored. I got my first iphone (3gs) just 3 month ago, and HD2 was like a gift from my friends in America.

[Q] Battery life very bad on CM7

Hi everyone,
I have a big problem of battey usage on Android...
I flashed the NexusHD2 rom in a first time and i realised the battery life was very bad ! (I lost 3% for 5 minute of use !)
I flashed the famous Typhoon CM7 rom and it's the same...
My Radio is 2.15.50.14 and i use CLK.
Thanks for your help

Try a different kernel. That helped in ICS, so after some trial-error you should find a good one.
Sent from my HTC HD2 using XDA

What kernel is the best for it ?

I use Hyperdroid w/ seader r9 kernel. I get pretty decent battery life with it. But you also have to remember that the HD2 is a bit older so it has a smaller battery and less power-efficient parts.

Xeroday said:
I use Hyperdroid w/ seader r9 kernel. I get pretty decent battery life with it. But you also have to remember that the HD2 is a bit older so it has a smaller battery and less power-efficient parts.
Click to expand...
Click to collapse
Agreed, i flashed STOCK Windows Mobile 6.5 from T-Mobile and the battery lasted exactly the same time as with Android on it. I found that the ROM/Kernel combinations only matter a little. The phone alone has horrible battery capacity.

elesbb said:
Agreed, i flashed STOCK Windows Mobile 6.5 from T-Mobile and the battery lasted exactly the same time as with Android on it. I found that the ROM/Kernel combinations only matter a little. The phone alone has horrible battery capacity.
Click to expand...
Click to collapse
Buy a high capacity battery could help a bit ?

zabu64 said:
Buy a high capacity battery could help a bit ?
Click to expand...
Click to collapse
A bit?! Lol that would obviously help a lot. I'm not quite sure how accurate CurrentWidget is, but in terms of standby battery drain I get 5ma drain with wifi on on my phone. On the same settings on my Mum's Desire S she gets 26ma. However she gets great battery life, which I would only guess is due to the larger battery (and the fact that she barely knows how to use the phone, so the screen isn't on very much at all).

Nigeldg said:
A bit?! Lol that would obviously help a lot. I'm not quite sure how accurate CurrentWidget is, but in terms of standby battery drain I get 5ma drain with wifi on on my phone. On the same settings on my Mum's Desire S she gets 26ma. However she gets great battery life, which I would only guess is due to the larger battery (and the fact that she barely knows how to use the phone, so the screen isn't on very much at all).
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I use batterymonitorwidget pro. And i get around 5ma with wifi and cellular on.

Try using an app called JuiceDefender - it works really well at extending battery life. It basically lets you tweak loads of options to do with data and syncing, so you can have it set that data doesnt run when certain apps are open, or data is off when the screen is off, etc.
There's an ultimate version available, but it is £4.99 from the play store. But I guess that'd be cheaper than a new battery?

The same problem occured to me a few weeks ago. I have been using HyperDroid-CM7 which worked quite decent for 5 or 6 months and had very good battery life. ABut a few weeks ago suddenly the battery life became to awfuly decay, wasting 20% of the energy for idle hour instead of the normal 1-2. I changed the rom to the NexusHD2 ICS port and the battery life slightly improved but rhe problem stays the same. Could it be because the battery itself is broken or some software calibrations are needed (I haben't done any for an year since I bought the device)