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[INFO] *UPDATED -17 June 09* Battery life problems? Stop here!

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bauerpavel

Senior Member
Dec 25, 2006
209
13
Prague, Czech Republic
This is a "Quick guide" to your battery - APPLIES TO Li-ion BATTERIES ONLY! (simplified version of an older thread http://forum.xda-developers.com/showthread.php?p=3834773#post3834773 )

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
This info doesn't come from me but from 2 (I believe trustful) sources:
Isidor Buchmann,CEO of Cadex Electronics Inc., in Vancouver BC, award winning author of many articles and books on batteries,has studied about rechargeable batteries for 2 decades
Fran Hoffart, Applications Engineer, Linear Technology, Milpitas, California

Original web sites:
http://www.batteryuniversity.com/partone.htm
http://www.buchmann.ca/faq.asp
http://powerelectronics.com/portabl..._ics/proper_care_extends-li-ion-battery-0425/
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------​

Charging tips
  • partial-discharge cycles can greatly increase cycle life, and charging to less than 100% capacity can increase battery life even further
  • after a full charge, a Li-ion battery will typically lose about 5% capacity in the first 24 hours, then approximately 3% per month because of self-discharge and an additional 3% per month if the battery pack has pack-protection circuitry
  • no need to charge for 5+ hours for the first time (priming), this doesn't work for li-ion chemistry
  • use ONLY ORIGINAL or HTC CERTIFIED chargers and batteries (they have extremely important function of cutting off
    the current when charging is at 100% * )
  • battery cannot be reconditioned by over-charging - avoid higher than 4,2V current (which might boost capacity but shorten cycle life)
  • no need to worry about memory effect with "unscheduled" charging
  • avoid soft reseting your phone while charging
  • allow several full charges after doing hard reset to get accurate reading
  • try to keep battery stress as low as possible when charging (sure shot is to charge the phone when turned off)
  • a deliberate full discharge and recharge every 30 charges corrects "wrong reading" phenomena in most cases, if ignored, the battery gauge will become increasingly less accurate
  • using battery chargers that feature a reduced float voltage (4-4.1V) can increase battery life when used to charge a 4.2V Li-ion battery

Discharging tips
  • full discharge cycles (down to 2.5 V or 3 V, depending on chemistry) should be avoided if possible (except for above mentioned case of recalibrating device)
  • using only 20% or 30% of the battery capacity before recharging will extend cycle life considerably. As a general rule, 5 to 10 shallow discharge cycles are equal to one full discharge cycle
  • avoid frequent full discharges, very deep discharges will quickly, permanently damage a Li-ion battery
  • avoid high-stress discharging, slower discharge=better battery life
  • discharge level doubles with every 10°C (18°F) of increased enviromental temperature


Usage tips
  • avoid extreme load conditions (applications using a lot of energy)
  • avoid keeping a fully charged battery at high temperatures
  • battery stored for a year or more will start "aging" - irreversible
    capacity lowering
  • maintaining a Li-ion battery in a fully charged condition will shorten its lifetime
  • store batteries charged at 40%
  • replace battery if original level drops bellow 80%, battery will lose about 10% of useful capacity each year (whether used or not)

* Selecting a charger that uses minimum charge-current termination (C/10 or C/x) can also extend battery life by not charging to 100% capacity. For example, ending a charge cycle when the current drops to C/5 is similar to reducing the float voltage to 4.1 V (see fig.3 bellow). In both instances, the battery is only charged to approximately 85% of capacity, which is an important factor in battery life. The letter “C” is a battery term used to indicate the battery manufacturers stated battery discharge capacity, measured in milliamp-hours. For example, a 2000-mAhr rated battery can supply a 2000-mA load for one hour before the cell voltage drops to its zero-capacity voltage.

Types of Li-ion batteries:
804li-ion-battery-life-Table01.jpg


Charging dependencies:

804li-ion-battery-life-Figure01.jpg

804li-ion-battery-life-Figure02.jpg

804li-ion-battery-life-Figure03.jpg
 
Last edited:

alex_time

Senior Member
How can I full discharge my battery? Simply left my TP on until it dies? I am wondering that if it is wrong reading battery level, maybe it switch itself off when it reads 0% but maybe the real battery level is..10% or 15%, how can I be sure that the battery is full discharge? My TP is 3 month old, so, or my battery is damaged, or my TP is not accurate reading battery level; I was forgotting that sometimes I have done some soft reset while charging (but not in the past two weeks)
 

kusbainian

Member
Dec 8, 2008
44
0
avoid soft reseting your phone while charging

Noticed something interesting the other day, here are the series of events that occurred:
- Battery died - phone turned off (is that considered a full discharge?:confused:)
- plugged it in, and it started to charge. The lights on the pad began to pulsate.
- Sometime later I realized that the phone was off so I turned it on. Mind you the lights were still pulsating indicating that it was charging. After the Version # screen came up and just before the Windows Mobile screen comes up. The lights which was in the middle of a pulse, stopped, and began again from the start. Is that considered an interruption in charging?:confused:
 
This should be a sticky!

The main problem I've come across is an inaccurate battery meter. Quite a few people using RRE WM6.5 have reported battery issues, but I've noticed its the meter, not the actual battery.

I RARELY did a full discharge (and I've had my phone since it came out in November). So after flashing the ROM, I did a full discharge. It stayed on 20% for a long time, then it stayed at 7% for a long time, then it seemed like it was at 1% forever. The phone finally shut off. I did a full charge while the phone was off. Now the battery meter is MUCH more accurate.
 

p51d007

Senior Member
Oct 15, 2007
2,186
370
Springfield, Mo
I'm using RRE's and noticed the "meter" issue. Think I'll give your suggestion a try and let it die over the weekend and juice it back up.

This should be a sticky!

The main problem I've come across is an inaccurate battery meter. Quite a few people using RRE WM6.5 have reported battery issues, but I've noticed its the meter, not the actual battery.

I RARELY did a full discharge (and I've had my phone since it came out in November). So after flashing the ROM, I did a full discharge. It stayed on 20% for a long time, then it stayed at 7% for a long time, then it seemed like it was at 1% forever. The phone finally shut off. I did a full charge while the phone was off. Now the battery meter is MUCH more accurate.
 
I'm using RRE's and noticed the "meter" issue. Think I'll give your suggestion a try and let it die over the weekend and juice it back up.
My phone has been off the charger for about 8.5 hours now. I sent/received about 10 texts, and I've had about 10 emails pushed through Windows Live and my battery is at 92% now. All on Edge with a good signal. Not too bad for me.
 

mxgoldman

Member
Apr 24, 2009
39
4
Battery Life

While the Fuze doesn't get the greatest battery life, one thing I immediately noticed was the extension of life when I switched my email from checking every five minutes to once every hour.

Just saying.
 
While the Fuze doesn't get the greatest battery life, one thing I immediately noticed was the extension of life when I switched my email from checking every five minutes to once every hour.

Just saying.
Every 5 minutes would cause a huge drain in battery. You would be better off pushing email to your phone than checking every 5 minutes. Once per hour isn't too bad unless you're getting lots of emails every hour.
 

thesilentnight

Senior Member
Mar 13, 2008
342
7
This is great information...thanks for the tips...and yes, getting emails every five minutes SERIOUSLY drains the battery...i learned that the hard way
 

mxgoldman

Member
Apr 24, 2009
39
4
This is great information...thanks for the tips...and yes, getting emails every five minutes SERIOUSLY drains the battery...i learned that the hard way

I noticed when I could watch my battery drain and the phone was burning hot.

It was also shocking when it had 100% charge when I went to bed and was dead when I woke up.
 

mlk

Senior Member
Jul 8, 2005
224
1
Davistown
Same here

MX, I thought I was going mad (going m-m-m-m-mad, I say). Last night, I turned off S2U2 (a notable battery drainer) and my Pro was at 100% battery at around 11pm, woke at 7am to find that the battery was @ 5%! To my knowledge, nothing else was running - certainly no phonecalls or texts and no other actions. Only thing I noticed (because I had forgotten) was that the Bluetooth headset was still connected and switched on - surely this couldn't have killed the battery in 8 hours?
 

Phantom55

New member
Jun 5, 2009
1
0
I heve recently bought a new HTC Touch Pro. After just few weeks, battery's gone crazy. It doesn't want to recharge, even connected to charger for 16 hrs. I got the icon of charging, I can still do anything as usual despite the battery doesn't save any energy. Could it be some energy drain? I'd be grateful for help.

gmanfuzing: I think it depends on how much operational memory does the ActiveSync use. Try shutting it down.

edit: problem solved, gentlemen. It's a failure of my ac adapter. Sorry for making trouble.
 
Last edited:

lbhocky19

Senior Member
Feb 18, 2007
2,148
19
my battery has gone to hell
im on sheps 6.5 with the newest att radio
i had my phone at 100 pct an hour and half ago and it has since dropped to 85 and ive sent literally one text
 

rajith

New member
Jun 6, 2009
2
0
Battery Drain Problem - Day 1

I got my Raphael 5 days back and immediately installed few apps and did some tweaks (energy and performance) using PHM Reg, Diamond Config tools and suddenly the battery started draining like crazy. ( 45% ) in 4 hrs.

I did a hard reset, disabled TF3D, did some energy saving tweaks using Advanced Config.

Here are my readings...

8.30 am - 100%
9.30 am - 98% - 2% Just Standby ( No push mails or Data Connections )
10.30 am - 95% - 20 mins MP3 and 2 SMS
11.30 am - 90% - Did Absolutely Nothing except 4 checking the battery :(
12.30 pm - 90% - Did Absolutely Nothing except 4 checking the battery :)
1.30 pm - 86% - Disabled Battery Icon ( Soft Reset ) Installed Ariel Battery

and continuing I'll keep updating...
BTW is this reading normal??? Personally im not too pleased.

P.S.: Just want to know how can I know what version of ROM and Radio is currently there in my device
 
Last edited:

bauerpavel

Senior Member
Dec 25, 2006
209
13
Prague, Czech Republic
I got my Raphael 5 days back and immediately installed few apps and did some tweaks (energy and performance) using PHM Reg, Diamond Config tools and suddenly the battery started draining like crazy. ( 45% ) in 4 hrs.

I did a hard reset, disabled TF3D, did some energy saving tweaks using Advanced Config.

Here are my readings...

8.30 am - 100%
9.30 am - 98% - 2% Just Standby ( No push mails or Data Connections )
10.30 am - 95% - 20 mins MP3 and 2 SMS
11.30 am - 90% - Did Absolutely Nothing except 4 checking the battery :(
12.30 pm - 90% - Did Absolutely Nothing except 4 checking the battery :)
1.30 pm - 86% - Disabled Battery Icon ( Soft Reset ) Installed Ariel Battery

and continuing I'll keep updating...
BTW is this reading normal??? Personally im not too pleased.

P.S.: Just want to know how can I know what version of ROM and Radio is currently there in my device

Settings-System-Device Info
 

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    This is a "Quick guide" to your battery - APPLIES TO Li-ion BATTERIES ONLY! (simplified version of an older thread http://forum.xda-developers.com/showthread.php?p=3834773#post3834773 )

    -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
    This info doesn't come from me but from 2 (I believe trustful) sources:
    Isidor Buchmann,CEO of Cadex Electronics Inc., in Vancouver BC, award winning author of many articles and books on batteries,has studied about rechargeable batteries for 2 decades
    Fran Hoffart, Applications Engineer, Linear Technology, Milpitas, California

    Original web sites:
    http://www.batteryuniversity.com/partone.htm
    http://www.buchmann.ca/faq.asp
    http://powerelectronics.com/portabl..._ics/proper_care_extends-li-ion-battery-0425/
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------​

    Charging tips
    • partial-discharge cycles can greatly increase cycle life, and charging to less than 100% capacity can increase battery life even further
    • after a full charge, a Li-ion battery will typically lose about 5% capacity in the first 24 hours, then approximately 3% per month because of self-discharge and an additional 3% per month if the battery pack has pack-protection circuitry
    • no need to charge for 5+ hours for the first time (priming), this doesn't work for li-ion chemistry
    • use ONLY ORIGINAL or HTC CERTIFIED chargers and batteries (they have extremely important function of cutting off
      the current when charging is at 100% * )
    • battery cannot be reconditioned by over-charging - avoid higher than 4,2V current (which might boost capacity but shorten cycle life)
    • no need to worry about memory effect with "unscheduled" charging
    • avoid soft reseting your phone while charging
    • allow several full charges after doing hard reset to get accurate reading
    • try to keep battery stress as low as possible when charging (sure shot is to charge the phone when turned off)
    • a deliberate full discharge and recharge every 30 charges corrects "wrong reading" phenomena in most cases, if ignored, the battery gauge will become increasingly less accurate
    • using battery chargers that feature a reduced float voltage (4-4.1V) can increase battery life when used to charge a 4.2V Li-ion battery

    Discharging tips
    • full discharge cycles (down to 2.5 V or 3 V, depending on chemistry) should be avoided if possible (except for above mentioned case of recalibrating device)
    • using only 20% or 30% of the battery capacity before recharging will extend cycle life considerably. As a general rule, 5 to 10 shallow discharge cycles are equal to one full discharge cycle
    • avoid frequent full discharges, very deep discharges will quickly, permanently damage a Li-ion battery
    • avoid high-stress discharging, slower discharge=better battery life
    • discharge level doubles with every 10°C (18°F) of increased enviromental temperature


    Usage tips
    • avoid extreme load conditions (applications using a lot of energy)
    • avoid keeping a fully charged battery at high temperatures
    • battery stored for a year or more will start "aging" - irreversible
      capacity lowering
    • maintaining a Li-ion battery in a fully charged condition will shorten its lifetime
    • store batteries charged at 40%
    • replace battery if original level drops bellow 80%, battery will lose about 10% of useful capacity each year (whether used or not)

    * Selecting a charger that uses minimum charge-current termination (C/10 or C/x) can also extend battery life by not charging to 100% capacity. For example, ending a charge cycle when the current drops to C/5 is similar to reducing the float voltage to 4.1 V (see fig.3 bellow). In both instances, the battery is only charged to approximately 85% of capacity, which is an important factor in battery life. The letter “C” is a battery term used to indicate the battery manufacturers stated battery discharge capacity, measured in milliamp-hours. For example, a 2000-mAhr rated battery can supply a 2000-mA load for one hour before the cell voltage drops to its zero-capacity voltage.

    Types of Li-ion batteries:
    804li-ion-battery-life-Table01.jpg


    Charging dependencies:

    804li-ion-battery-life-Figure01.jpg

    804li-ion-battery-life-Figure02.jpg

    804li-ion-battery-life-Figure03.jpg