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[HOW TO] Calibrate Desire Battery

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vidler

Member
Jul 10, 2010
10
26
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.

Mod Edit: There have been a few reports of damaged batteries by people on this thread. There is a chance that this MAY damage your battery. Please bear this in mind if you choose to follow the instructions above.
 
Last edited by a moderator:

PStephan88

Senior Member
Jul 1, 2010
112
5
Munich
It works!!!

That's fantastic!

I read this topic this morning and tried immediately. Since this morning i only lost 4% until now. That's great news!

Thx a lot, man!

Sent from my HTC Desire using XDA App
 

Phily757

Senior Member
Jan 6, 2010
320
18
Stuttgart
takes a long time to charge my Desire, but then i'll test this one!
Hope this will make battery life better. I have the same problem as described in first post (drops immediatly from 99% down to 93% :( )
 

xNavyblue

Member
Aug 13, 2010
27
0
Can someone suggest me how should I go about doing this if I use multiple batteries?

I'd imagine the phone can only be calibrated to 1 battery. But if I were to use another battery, would I screw up the calibration to the original batteries?

Right now as it is with moderate usage I need 3 batteries to last me through the day. :S
 

BlackDragonBE

Senior Member
Jan 14, 2010
155
4
Can someone suggest me how should I go about doing this if I use multiple batteries?

I'd imagine the phone can only be calibrated to 1 battery. But if I were to use another battery, would I screw up the calibration to the original batteries?

Right now as it is with moderate usage I need 3 batteries to last me through the day. :S
3 batteries?! :eek:
What rom are you using and how exactly are you using your phone?

I have just one battery and it lasts about 2 days with moderate use.
 

xNavyblue

Member
Aug 13, 2010
27
0
I am using this ROM: (sorry can't post link)

[ROM] Rooted Official HTC Android 2.2 (FroYo) ROM [Market issue fixed]

With my typical usage, I unplugged the phone in the morning from the charger, by the time I knock off from work, I would have left about may be 20%. With stock ROM and a single battery, there is no way that I could last 2 days with one single charge. My main use is web browsing, RSS, Facebook and IM. My estimation of my solid screen time is about 2-3 hours.

So I bought more battery just in case, and played with custom ROMs. I ended up using up a whole battery in 4 hours or so. Definitely something is wrong here. My gut feel is that both the ROM and batteries are suspects. Being a newbie I really need enlightenment.
 

Dany0

Senior Member
Jun 1, 2010
586
11
Is it really needed to wipe the stats? I think I've accidently done this once already... cause the battery life is much better.
 

schidddy

Senior Member
Feb 5, 2010
292
23
Schaffhausen
since this procedure, my battery stays at 100% since nearly 2 and a half hours now and i did 2 text messeges in between and recently checked the bat about 4 times

this couldnt be possible..
i mean the battery is almost doubled in comparison to how long it lasts before :D

is this possible??
 

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  • 25
    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.

    Mod Edit: There have been a few reports of damaged batteries by people on this thread. There is a chance that this MAY damage your battery. Please bear this in mind if you choose to follow the instructions above.
    5
    You should wipe battery stats after its fully green (when powered off) then boot the phone back up.

    You only need to do this once

    I.e.

    Charge till full when powered on
    power off
    charge till full again
    boot into recovery wipe stats
    boot and continue to use as normal
    4
    Stunning how much people read this thread and remain under impression this is how calibration is supposed to be done. The only real calibration is through Nexus calibrator by Jon Richards and everything else such as deleting batterystats.bin is just foolish.

    This thread should have tag 'deprecated' or something similar.

    Sent from my HTC Desire using Tapatalk 2
    2
    No it's because the battery has some kind of protection against over-over charging(in case that you have bad charger/electricity connection). It has a small module in it that protects it from going to the real 0%(in which case the battery is totally dead and unrecoverable) and from going it to charge itself to 110%-ish. That stuff happens, so the module must first "learn" it's okay to charge it 100%.

    I think that somewhere I've read that it's.... oh there it is
    [tip] charge battery after green light for atleast 2-3 hours. THEN wipe before you unplug with the fully charged batt. It will def. gain you battery life more than just 1 hour after green light... I think its because of the trickling mechanism that it turns into after it has so much charge in it. I do that now and It usually takes 2-3 hours with moderate usage to get down to 85% (auto brightness). that's with wifi and edge on (0% without signal bcuz of using edge)

    if battery is not at 4197mv it's not fully charged. =p GL

    I just updated to cm6rc2 for this kernel... yesterday i got 12.5 hrs battery before it died. hopefully this will do even better

    So 4197mv is full charged. When it goes over like 4200mv it's very dangerous and it may blow-up quickly. If it goes 4500mv-ish it's just BOOM!
    icon10.gif


    And soo.. yes 4197 will never blow-up(seriously) a little more then that and boom. This "hack" makes the module "learn" to charge it to 4197. Or less in most cases.
    1
    Don't know yet. I guess I'll stick around here for a while.

    I guess I'll hold unsubscribing to the Desire section then. :D

    via xda app