Database Users

Battery Drain HD2?

Anyone else experiencing excessive battery drain on their HD2?
I am interested to know if this is just my phone or if it actually just chews through that much juice.
I have had windows mobile phones for several years so I know all the basic ways to keep battery drain down.
Stuff that I have generally found:
1. If I keep the screen turned on without it going blank I lose about 1% every 2 minutes.
2. If I am browsing that figure almost doubles.
3. My old Touch HD used about 5% battery overnight when in standby but this phone will go through about 25%.
4. The phone gets really hot when browsing (much hotter than my old Touch HD)
I have tried flashing ROM's and Radios but nothing seems to help.
I am not running any software on the phone that I wasn't running on my old HD1.
I have only had the phone for a week so I am not sure if this is normal but I would be very surprised if HTC released a phone that lasts for only a few hours on one battery.

+1
-1% every 3 minutes
-4% during the night (when i'am sleeping)
MAXIMUM : 45/48 HOURS

Crash95 said:
+1
-1% every 3 minutes
-4% during the night (when i'am sleeping)
MAXIMUM : 45/48 HOURS
Click to expand...
Click to collapse
I wish I got 2 days

we really need extended battery ,hd1 battery was much more better.

Good mate but yes i agreee HTC has come up with a battery eating device this time around. My device on full charge just gives in around 8-10 hrs. This might be dat my EDGE is on and 7 mails accounts sending mails back and forth.
but truly i think that HTC better look into this very seriously cause more and more ppl are suffering in this battery drain..
Any of flashing roms and radio not helping either... did a complete hard reset but no step up
HTC come with longer battery battery for bigger devices soon......
The only solution i see now is get one of those extra battery worth mind bogling £52.87

I've had this problem ever since flashing to 1.66, I flashed the radio to 2.07.50.27 as this was said to solve the problem but it hasn't made any difference after a few days of use. My battery life used to be significantly better when I was on the original stock ROM, so much so I'm considering going back to it
I also know all the tricks as to clawing back the battery drain, my phone is idle on my desk at work most of the time and I don't use Wi-Fi, all the location stuff is turned off as are weather, stock and other updates plus my screen is set to 30% then off after 60 seconds. Despite all of that I lose 1% every 2-3 minutes
It seems to me that perhaps the radio is checking for reception pretty much constantly rather than say, 5-10 mins perhaps? This used to be a problem on my old Blackberry Storm but a few fimware updates solved it, eventually!
The only other thing I've noticed since the update is that once the battery drops below 50% or so, the drain seems to slow, I don't know if this is perhaps because the phone goes into some sort of semi-power saving mode?
Suggestions/hints welcome! I've had a semi-thorough look into this on the forums and tried most of the suggestions but still the problem remains. Will battery life improve after a few charges perhaps as this was a trait of my Storm's battery, the more you charged it the better the day to day battery life was (and no it wasn't because I had it plugged in all the time! Over time the general charge just seemed to improve when roaming).
Thanks!

Piemole said:
Anyone else experiencing excessive battery drain on their HD2?
I am interested to know if this is just my phone or if it actually just chews through that much juice.
I have had windows mobile phones for several years so I know all the basic ways to keep battery drain down.
Stuff that I have generally found:
1. If I keep the screen turned on without it going blank I lose about 1% every 2 minutes.
2. If I am browsing that figure almost doubles.
3. My old Touch HD used about 5% battery overnight when in standby but this phone will go through about 25%.
4. The phone gets really hot when browsing (much hotter than my old Touch HD)
I have tried flashing ROM's and Radios but nothing seems to help.
I am not running any software on the phone that I wasn't running on my old HD1.
I have only had the phone for a week so I am not sure if this is normal but I would be very surprised if HTC released a phone that lasts for only a few hours on one battery.
Click to expand...
Click to collapse
You need to indicate what services you have running. Do you have any data services running eg: location services, push mail, weather? all of these have a bearing. In addition, network services can also drain a battery, especially if the signal is weak and the phone have to search for a transmitter, or 3g services.

Hexjibber said:
The only other thing I've noticed since the update is that once the battery drops below 50% or so, the drain seems to slow, I don't know if this is perhaps because the phone goes into some sort of semi-power saving mode?
Thanks!
Click to expand...
Click to collapse
That is a very interesting comment. Although since upgrading to radio 2.07.51.05_2 I have had very good battery life, I too have noticed a slowdown after 50%

romac said:
You need to indicate what services you have running. Do you have any data services running eg: location services, push mail, weather? all of these have a bearing. In addition, network services can also drain a battery, especially if the signal is weak and the phone have to search for a transmitter, or 3g services.
Click to expand...
Click to collapse
Nothing is turned on, everything is set to manual.
As I stated I know all the basic stuff. I understand that all these things have a bearing on battery loss.
Everything I stated in the first post is for when I have nothing running. The phone is just sitting there running sense, thats all.

I have had my HD2 for a few days now. I am on Vodacom in South Africa.
I have not had a problem with battery life.
Yesterday i unplugged from the charger at 07:00. I spent about 1 and 1/2 hours of talk time on the phone, it was permanently connected to 3g doing weather updates etc. Sent and received a couple of sms's. Also played with a few tweaks and reboots.
When i got home at about 18:00 i had over 30% battery. I then surfed the web for over 2 hours to drain the battery.

try setting Network Selection to Manual

Piemole said:
Anyone else experiencing excessive battery drain on their HD2?
I am interested to know if this is just my phone or if it actually just chews through that much juice.
I have had windows mobile phones for several years so I know all the basic ways to keep battery drain down.
Stuff that I have generally found:
1. If I keep the screen turned on without it going blank I lose about 1% every 2 minutes.
2. If I am browsing that figure almost doubles.
3. My old Touch HD used about 5% battery overnight when in standby but this phone will go through about 25%.
4. The phone gets really hot when browsing (much hotter than my old Touch HD)
I have tried flashing ROM's and Radios but nothing seems to help.
I am not running any software on the phone that I wasn't running on my old HD1.
I have only had the phone for a week so I am not sure if this is normal but I would be very surprised if HTC released a phone that lasts for only a few hours on one battery.
Click to expand...
Click to collapse
Same here with and without stock ROM.

yeah.. the phone is a battery sucker.... another cons of HD2....

This is very interesting to read because I do not have this problem. When I left my HTC HD2 on last night (I woke up at 4 in the morning to get something to drink and unplugged it) and then woke up at 8, it was at 98%. That means it went from 100% to 98% in 4 hours. Not to bad imo.
I am now at work and it is 15:34, and I am at 87%. I have made some calls, watched some videos, send a few text messages. Not much (I am at work so I got other things to do). So 08:00 (98%) - 15:34 (87%) - that's 7 and a half hours, with some calls, text messages and a video.
I am pretty sure when I get home at 18:30 the battery will still be above 75%. Then I connect to my wifi at home, refresh twitter, weather, browse the web a little bit, check e-mail etc. So that will drain my battery a little more.
But overall I have not had any problems with my battery life. I always make it trough a day, and never have a problem like 'damn my battery is almost done and I am not near a charger'.
Some info that might help:
I do not sync ANYTHING automatically. I still have some things to do with my Vodafone contract and do not have an unlimited plan yet. I only sync at home on my own wifi connection. For me this is not a problem, because I only need to refresh the weather each morning to see what the day is going to be like. Twitter I only do when I have the time. Stocks I do not use.
I have screen brightness set to automatic.
I am on 3G most of the time.
I am running the official 1.66 Dutch ROM.
I have some tweaks, games and programs installed.
I hope you all solve this issue, because it just can not be that my HD2 has a good battery life, and your HD2 not
Kind Regards
EDIT @ 17:00 still 87%.

I am in a 3G 2100 only network (I don't have 2G functionality).
ROM: Artemis 3.0
Radio: 2.06.50.23_3
Customization: Seiya 6.5.5
I don't leave any automatic updates on, except for my e-mail account every 2 hrs.
I never close my connection.
The drainage overnight is -3% (8hrs).
The battery lasts at least 12 hrs of intense usage.
Normally I have to recharge every second day (e.g. I charged last night, I answered a few calls, I did some IM and browsing and I still have 73% left).
For a phone with a 1 GHz processor, a 4.3" screen and a tiny 1250 mAh battery I find the drainage is rather decent.
Mind you, I ALWAYS do at least one full charging cycle to my battery after flashing a new ROM. I mean: full discharge, battery out 1 min, full charging in OFF mode, battery out 2 mins.

27firesnake said:
Mind you, I ALWAYS do at least one full charging cycle to my battery after flashing a new ROM. I mean: full discharge, battery out 1 min, full charging in OFF mode, battery out 2 mins.
Click to expand...
Click to collapse
I have seen this process recommended a couple of times now. What is the theory behind it if you don't mind me asking?

maybe its also becouse some of us couldnt wait using the hd2 when they got it (like me) before it was fully charged for the first time
anyway my battery life has improved a little bit, i was at 74% this morning and did a lot of browsing, installing, tweaking and now its at 3%. it used to be much worse

I have battery consuming problem from time to time.I did everything:
installed new stock rom 1.66;
transfered all data which phone is using from card to phone memory(pictures,icons,sounds.etc...)
all updates are done manually;
Gprs connection is swiched off on the idle after one min;
One night it is loosing from 2 to 4%;
another from 30 to 40%
and it is eating memory from 10 to 15mb
I think that it is radio which is causing battery drainage so fast(to much communication wit a base stations,because when I am checking spb wireless monitor in the morning,there is no any data traffic.
I hope they can solve problem,because it is getting me mad and crazy

Try setting the screen brightness to 10-20% (on battery powered)
and dim backlight after 10 seconds (on batter powered).
It helps a lot, at least for me.

creed said:
I have seen this process recommended a couple of times now. What is the theory behind it if you don't mind me asking?
Click to expand...
Click to collapse
as far as i know, the battery has an integrated digital circuit (ic) which estimates the state-of-charge (soc). the procedure resets/calibrates the ic to obtain a more accurate estimation. since the radio rom is in charge with the power management (among other things), by changing it you decalibrate the "gauge".
i don't know if i've got the theory right but i tested this myself and it surely works.

Battery life is extremely short

Hey guys, I've had the phone since Saturday and even though I've been through a few charge cycles my battery only lasts about 6-8 hours. Today I took the phone off the charger at 10:00 AM and it died on me at 5:45 PM. I only texted a few times and only did an hour or so of Slacker Radio. Seems a little low for what I'm doing with the phone.
I am on Kumar's classic 2.2 ROM with 2.11 radio.

Matt V said:
Hey guys, I've had the phone since Saturday and even though I've been through a few charge cycles my battery only lasts about 6-8 hours. Today I took the phone off the charger at 10:00 AM and it died on me at 5:45 PM. I only texted a few times and only did an hour or so of Slacker Radio. Seems a little low for what I'm doing with the phone.
I am on Kumar's classic 2.2 ROM with 2.11 radio.
Click to expand...
Click to collapse
A lot of things can drain the battery, 3g on in a no 3g area, weather updates, twitter , email updates ...
But If I was you I would try a diff radio ... I get a full day out of mine at this point a little more ...

I've tried 2.12 as well and the battery didn't improve.

Is your activesync checking as items come in? That's what drained mine terribly. Basically, it can be a ton of things that make your battery drain such as:
1. backlight
2. agps
3. certain programs
4. etc
You'd have to list a bunch of stuff on what you're doing to your phone

Can you turn activesync off? If so, how?
Also, any other tips to save battery life?

Matt V said:
Can you turn activesync off? If so, how?
Also, any other tips to save battery life?
Click to expand...
Click to collapse
Definitely lower down the screen brightness to 20%, turn off Bluetooth and WiFi, don't let things like Twitter and your e-mail update so often.
Also using the internet/music/videos will drain quite a bit of power, especially if you use the internet while listening to music.

Yeah I mainly use internet radio while at work. Would using WiFi be easier on the battery than using 3G/H?

Matt V said:
Yeah I mainly use internet radio while at work. Would using WiFi be easier on the battery than using 3G/H?
Click to expand...
Click to collapse
Yes, I've done it both ways and wifi most definitely draws less juice when streaming data than 3g (and when idle too, for that matter)

do you think it matters whether you install programs on your SD card or on the device?
i have CHT installed on the SD card and i can't make it 8 hrs on light usage.

I only have 3 apps installed so far, but it's on the device.
Also, is there a way to have the default wallpapers without animation? I'm sure that doesn't help the battery every time I unlock the phone either.

Rugged96 said:
do you think it matters whether you install programs on your SD card or on the device?
i have CHT installed on the SD card and i can't make it 8 hrs on light usage.
Click to expand...
Click to collapse
Yes. Try installing it on and running it from the phone instead, I'm sure you'll see at least a noticible difference.
Honestly, there's really not much of any reason to install apps on the SD card with this phone...there's more storage available than even most power users would ever come close to filling.

im in teh same boat. had it since march. on elegancia rom which people say is great for battery. on 2.12
now im in a bad service area in my basement often so i know sometimes thats the cause. but even at the gym 40 mins of internet radio dropped my battery almost 20 percent.
if i do nothing with the phone it usually drops 5 pct an hour 10 pct with moderate use but 20 easily if i do anything on the web over 3g or wifi. its awful
oh and i have lumos configured, i only have email connect every 2 hours and weather every 6. nothing else connects

lbhocky19 said:
im in teh same boat. had it since march. on elegancia rom which people say is great for battery. on 2.12
now im in a bad service area in my basement often so i know sometimes thats the cause. but even at the gym 40 mins of internet radio dropped my battery almost 20 percent.
if i do nothing with the phone it usually drops 5 pct an hour 10 pct with moderate use but 20 easily if i do anything on the web over 3g or wifi. its awful
oh and i have lumos configured, i only have email connect every 2 hours and weather every 6. nothing else connects
Click to expand...
Click to collapse
Wow! your phone's battery usage sounds a little over the top. Might want to try using a different radio. 2.08 has given me the best signal/battery efficiency, but of course that varies from phone to phone.
Also, I bought a 2600 mAh battery so now I'm not afraid to use my phone. As long as you don't mind the extra bulk it adds to the back of the phone , I would suggest getting an extended battery to everyone complaining about how their battery dies too fast.

I will back up the statement that putting apps in main memory will save you battery ...
The less your phone has to access the SDcard the less power it uses.
A big thing is if you have any apps that run all the time that are on the SDcard , not only does it drain battery but will degrade the performance of the SDcard .

Anyone else have any ideas?

talked to tmo on webchat last night got em to send me a new battery
so if nothin helps at least il have two

I'm trying that method right now, we'll see what happens.

[HOW-TO] Battery calibration

I've just found that on the desire forum, do you think it will word on ours HD2?
vidler said:
Found this on another forum, I have done this a few times myself (do it whenever i flash a new rom because i always clear battery stats, can't hurt). Have found that it does top it up a fair bit. Before doing this i find my desire will drop to +-93% straight off the charger, however this keeps it 100% longer and i actually get to see the numbers 99-94%
Worth a go in my opinion because it only takes 5 mins of your time and can't hurt the phone... So any minor gain from this process is a win...
Hi *******, I understand your concern regarding battery life on your Nexus One device. The following steps should significantly extend the battery life on your phone. Please connect the phone to the charger with the phone powered on, and allow the phone to charge until the notification LED is green, indicating the device is fully charged. Disconnect the phone from the charger, and power it off. Reconnect the phone to the charger with the phone powered off, and allow the phone to charge until the notification LED is green. Disconnect the phone from the charger and power it on. Once the phone is powered completely on, power it off again and reconnect it to the charger until the notification LED is green. Disconnect the phone, power it on, and use it. You need to use this sequence only once. If the issue of battery life on our phone persists, I recommend you contact our HTC accessory department directly.
Click to expand...
Click to collapse
link to the original thread
http://forum.xda-developers.com/showthread.php?t=755903

my guess will be no on this. As i think that the batteries are different. and it might be something with batteries that are in droid devices perhaps.

extasy98002 said:
my guess will be no on this. As i think that the batteries are different. and it might be something with batteries that are in droid devices perhaps.
Click to expand...
Click to collapse
I'm trying right now i'll report as soon as I have an answer!
I think it should work as it's wiping battery stats in android

im trying it too as we speak

I'm pretty sure that calibration will not work currently in android properly. Cottulla posted a few days back that the battery driver is still incomplete and currently only supports reading battery state and that the write too part of the driver has not been implemented. When the driver is complete and has full read/write battery function this procedure should work better.

drewestate said:
I'm pretty sure that calibration will not work currently in android properly. Cottulla posted a few days back that the battery driver is still incomplete and currently only supports reading battery state and that the write too part of the driver has not been implemented. When the driver is complete and has full read/write battery function this procedure should work better.
Click to expand...
Click to collapse
thats' true i didn't know that . it may be impossible to wipe battery stats this way
....

My battery wasnt calibrated properly and wudnt charge over 90%. Someone in this forum told me to switch off and charge until green and then switch it on. Now my battery seems calibrated plus i got 2 days of use on moderate use

drewestate said:
I'm pretty sure that calibration will not work currently in android properly. Cottulla posted a few days back that the battery driver is still incomplete and currently only supports reading battery state and that the write too part of the driver has not been implemented. When the driver is complete and has full read/write battery function this procedure should work better.
Click to expand...
Click to collapse
but ive seen several posts of people calibrating their battery in winmo and reporting better battery life....idk maybe placebo

i will try this too. i myself had an issue today. i'm using chuckyrom right now. i use it at work so i can turn the "phone" off while at work. so it is in airplane mode. i only used the phone today to check the time and played some uno on a break. my battery stayed on 100% for 5 hours. so i turned the phone off, took the battery out for 1 minute. put the battery back in and turned the hd2 on. it was still on 100%. 4 hours later it was down to 94%. i just didn't think that a true battery reading. most days when i have the "phone" turned on at work i only have 10% battery left by the end of the day... just seemed odd to me. idk.

Well, I don't know if this works 'properly' or not but it's certainly had an impact so it's doing something right.
Prior to the calibration I could only charge to 95% or so. Phone now seems to be charging to 100% all the time which is good. Battery life also seems great, not sure if this is down to the calibration or not as I moved to Darkstone V2 (16/08/10) release the day before so don't have a baseline.
FYI, as I type this I'm on 49% battery remaining after being unplugged for 10hrs. Fairly light usage, couple of calls; some texting but quite a lot of browsing and XDA App on 3G and WiFi.
Amazing progress the devs are making. Have been running various builds of Android for a week or so no and haven't yet had to revert to WiMo.
Sent from my HD2 using XDA App
Edit: Couldn't figure out how to take a screenshot without plugging in (and hence losing the 'time since last unplugged stat') - so here's a ropey photo for the inevitable 'screenshot or it didn't happen' remark Seems I've been unplugged for 13hrs not 10... where does the day go?!

Anyone able to do this with mattc Leo + Froyo w/Sense? The charge indicator LED never changes to green.

retain81 said:
Edit: Couldn't figure out how to take a screenshot without plugging in (and hence losing the 'time since last unplugged stat') - so here's a ropey photo for the inevitable 'screenshot or it didn't happen' remark Seems I've been unplugged for 13hrs not 10... where does the day go?!
Click to expand...
Click to collapse
Yeah, its hard to remember to take a screenshot before you plug it in (or in my case...reboot the phone)
You may want to try BatterySnap...its a free app in the market which gives you a great battery widget, plus a lot of really useful graphs and information.
I upgraded to Froyostone on the 12th...thats why the information is only going back that far...but as you can see, 18-19 hours a day at moderate usage is what I am getting on a regular basis
Cheers

Hey guys, I'm trying this method but my battery won't charge past 99%. any suggestions?

interfreak said:
Hey guys, I'm trying this method but my battery won't charge past 99%. any suggestions?
Click to expand...
Click to collapse
Power the phone off...then charge till you get a green light (Maybe even for an extra 10 minutes or so)...power the phone back up and plug into your charger. now it should charge up to 100%
I dont know if the battery itself is limiting the charge, or if its just the battery meter that is not displaying correctly...Anyhow, the above method corrects it for me whan this happens on my phone.

Thanks matey . I've only had my HD2 for five days but thanks to the awesome resource that is the xdadevelopers forum, I'm successfully running Android on my phone. :-D
AND This is my first WM device, have had iPhones for the past 2 years lol!

agentaaron said:
Yeah, its hard to remember to take a screenshot before you plug it in (or in my case...reboot the phone)
You may want to try BatterySnap...its a free app in the market which gives you a great battery widget, plus a lot of really useful graphs and information.
I upgraded to Froyostone on the 12th...thats why the information is only going back that far...but as you can see, 18-19 hours a day at moderate usage is what I am getting on a regular basis
Cheers
Click to expand...
Click to collapse
Cheers for the heads up - that looks like a great app! Downloading now...

quick question , do we do this while runnning android or windows mobile?

I did it from Android and seems to have worked a treat.

alantak said:
Anyone able to do this with mattc Leo + Froyo
w/Sense? The charge indicator LED never changes to green.
Click to expand...
Click to collapse
Just to confirm, I'm on ChuckyDroidROM with mattc Leo + Froyo w/Sense 1.5b.
- I can charge to green when the phone is powered off.
- I cannot charge to green in ChuckyDroidROM WM (says 100 in Battery screen, just no green LED)
- I cannot charge to green in mattc Leo + Froyo
w/Sense (stays at 98 in Battery screen)

Hi i am on ChuckyDroid ROM 2.12.50 Radio and darkstones 2.1 build.
have don successfully the trick in post 1.
Now having 100% in the taskbar and i will report if the battery life have improved.

[Q] Battery drains so quickly on hd2!!!

hi i am currently running the latest version of android on my sd card-(americanandroid 4-2-11)...i noticed i only get about 3-4 hours of battery life on my phone with wifi, bluetooth off and screen timeout after 30 seconds..i have no active widgets on homescreen and the battery is brand new...what do you think is the problem???
ps.-- i am running a stock tmobile rom with radio 2.08...

SD Builds have bad battery usage, that's a fact. You can always try to flash a newer radio onto your device to improve battery usage, but I don't know if this is possible without problems because of your sim-locked phone. Solution to your simlock:
http://forum.xda-developers.com/showthread.php?t=612580
" -B) If you can NOT download stock 3.14 ROM from HTC site for your phone S/N
--This post(http://forum.xda-developers.com/showpost.php?p=8945325&postcount=28077) by the user oliverweidel for "branded" phone flashing steps and this post(http://forum.xda-developers.com/showpost.php?p=9614007&postcount=30954) "Gold Card Experience" by venomhtchd2 "
I also think the battery of your phone is getting "lazy". So you might want to switch to NAND roms (go for gingerbread as it has the best battery life) and maybe get a new battery for your phone.

perez7504 said:
hi i am currently running the latest version of android on my sd card-(americanandroid 4-2-11)...i noticed i only get about 3-4 hours of battery life on my phone with wifi, bluetooth off and screen timeout after 30 seconds..i have no active widgets on homescreen and the battery is brand new...what do you think is the problem???
ps.-- i am running a stock tmobile rom with radio 2.08...
Click to expand...
Click to collapse
I ran the AmericanAndroid[3/20/11] and had over 26 hours of battery life among which 18 was of heavy use. I had brightness on minimum(NO AUTO), Screen Time-out was 1 minute, WIFI always on since I don't use my HD2 with a data plan, Auto-Sync, 2G active on mobile network instead of 3G/H.
The reason how I achieved this was because of proper battery calibration. There are a few factors that affect it. The most important ones being the percentage your battery level was at when you first booted into Android how you charge your phone.
Here is what I did to "calibrate" :
1.Charged my phone to 100% for 6 hours straights while it was turned ON.
2. Power off the phone while it is still plugged in and left it to charge for another 15 minutes.
3. Unplugged, removed battery, pressed and held the power button on phone for 5 seconds.
4. Turned the phone back on and once I saw the Boot screen(Android), I plugged it in.
5. Deleted the battery stats file using the following in Terminal Emulator :
Code:
su
(Hit enter)
rm data/system/batterystats.bin
(Hit enter)
Once that's done, use your phone as much as you can. to drain the battery. Let your phone die by itself. Once it dies, keep turning it on until it doesn't turn on anymore. then plug it in and boot into Android as fast as you can. If you repeat this one more time, you should see significant improvement in your battery life.
This "tutorial" isn't mine. I read some of around here itself and found some of it on other forums dealing with battery care. All credit goes to those OPs of those TUTs

same problem here

i would appreciate if someone could explain to me why my battery drops off like this and my signal is so intermitent

jonsson4000 said:
i would appreciate if someone could explain to me why my battery drops off like this and my signal is so intermitent
Click to expand...
Click to collapse
Booted into windows for a while?

[Q] Battery life problem

Hi,
probably someone else have just post this kind of question, but i don't find it , really, sorry
i have just install 2_HD2 Pdaimatejam Rom Wp7.8 OS Is the last version, i think...
the problem is that, the battery life is less then 4 hours . how can i do ? it's normal ?
thanks for replay

look my signature

I would like to add: after flashing ROM fully discharge your battery and then recharge it. After that go to registry editor on your phone and go to
Code:
[B]HKLM/system/state/batteryux/MainIntervalIndex[/B]
and change the value from 6 (or any value it shows there) to 20...now press OK! You wil see that the battery level on top has been changed!
Now again edit it and go from 20 to 80 and press OK...
RESTART YOUR PHONE AND THEN CHARGE IT!
This helps me a lot. I used my phone about 37 hrs with calls, little use of BT and WiFi.
and then you don't need to do
- when battery drop to 50% (for example), restart phone... battery status be refreshed and show around 20% more battery level.... sometimes i restart 3-4 times phone before need to charge it....
Click to expand...
Click to collapse

dxdy said:
look my signature
Click to expand...
Click to collapse
thank you, i read...
but bt, wifi, data connection was just turn off, and battery saver turned on.
mail, fb, and other social app, not configurated.
i have set the cam now, on video...
in effects let me see 58 % of charge and 7h remaning...
i have restart the phone, and now is on 74% and a day remaning...
i hope is true , but a don't belive so much
with original WM 6.5 was not less than 2 days
thank u

Iojjj said:
I would like to add: after flashing ROM fully discharge your battery and then recharge it. After that go to registry editor on your phone and go to
Code:
[B]HKLM/system/state/batteryux/MainIntervalIndex[/B]
and change the value from 6 (or any value it shows there) to 20...now press OK! You wil see that the battery level on top has been changed!
Now again edit it and go from 20 to 80 and press OK...
RESTART YOUR PHONE AND THEN CHARGE IT!
This helps me a lot. I used my phone about 37 hrs with calls, little use of BT and WiFi.
and then you don't need to do
Click to expand...
Click to collapse
i'll do it now !
thank u

Tested... i try to set 20 or another number , but on restart , i go to see and return always 10...
anyway, with 30 mins call and 30 min of data on , and 20 min wi-fi
arrive to 9 hours... better than 4, not so much..

Planet O said:
Hi,
probably someone else have just post this kind of question, but i don't find it , really, sorry
i have just install 2_HD2 Pdaimatejam Rom Wp7.8 OS Is the last version, i think...
the problem is that, the battery life is less then 4 hours . how can i do ? it's normal ?
thanks for replay
Click to expand...
Click to collapse
haha, you are joking right?
where exactly did you look?
how about google 'hd2 windows 7 battery'
there are +3000000 hits and the first page has several links to xda here and also youtube videos to watch
this is a common problem for all these windows 7 roms.
the registry tips posted in below and also try the 'camera trick' which works for me

Planet O
well, the main trick is to discharge to 0 and than re-charge battery. My battery drain today is about 1% per hour. Battery consumption is very individually.
P.S. I installed hardware radio 2.12 and software radio 5.51. This cimbination is much better for me.

Hello,
i don't want to start new thread about my problem, so i pin here.
When i was thinking about to buy HD2 i didn't realize what i am going into, but now i have to continue.
Well everything is fine except damn powerdrain. It is normal to have on high usage 300-500 mA drain? Well i understand this usage when playing for example gta3 on nativeSD android, but seriously...?
Normal work drains my battery on android in 4 hours (NativeSD nexusHD2 - Wifi, exploring web, youtube, facebook etc) with about 150-300mA usage. Well i have to admit that currentwidget cannot show drain properly, but what it shows look really insane.
Also i found on WP7 more outrageous drain. I plugged in charger to HD2 and launched sims3. The battery was at 5%, but gaming made my battery dead. I had to buy external battery charger to apply some power, because battery was too weak to hang in boot time.
My primary questions:
1. Is this high drain normal?
2. Is 80mA charging power normal (using HTC charger)?
3. If i flash android to nand, will power consumpion on high usage be less?