battery life fix

Discussion in 'HTC Droid Eris' started by ironslave, Nov 16, 2009.

  1. andyruina

    andyruina New Member

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    Drain battery

    But this advice is consistent with the observation, and it is mine as well, that the battery life goes up with use.

    A separate question. Some people like Task Manager and Task Killer
    and some say they cause problems. What about killing programs using
    the software on the phone:
    Settings -> Applications -> Manage applications ->
    press on application name -> press on force stop.
    The problem is, on my phone, pressing on "force stop" seems to have
    no effect.
     
  2. jltung

    jltung Member

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    Lithium ion vs. Ni-Cad battery - Drain or NOT to drain ???

    I understand there is a lot of confusion about the advantages of draining the

    DROID battery to get maximum performance. Personal anecdotal experience

    is important but I think we must investigate the facts before advising others.

    Please consider the following information which I lifted from another post:


    WTF, below is info pasted from wikipedia, it appears the excessive heat that the droid sometimes produces may be causing the battery to age rapidly. Of major interest is the explanation of the self discharge actually being permanent loss of capacity!
    Lithium-ion batteries do not suffer from the memory effect. They also have a self-discharge rate of approximately 5-10% per month, compared with over 30% per month in common nickel metal hydride batteries, approx. 1.25% per month for Low Self-Discharge NiMH batteries and 10% per month in nickel-cadmium batteries.[31] According to one manufacturer, Li-ion cells (and, accordingly, "dumb" Li-ion batteries) do not have any self-discharge in the usual meaning of this word.[21] What looks like a self-discharge in these batteries is a permanent loss of capacity (see below). On the other hand, "smart" Li-ion batteries do self-discharge, mainly due to the small constant drain of the built-in voltage monitoring circuit.
    [edit] Disadvantages of traditional Li-ion technology

    [edit] Shelf life
    A disadvantage of lithium-ion cells lies in their relatively poor cycle life: upon every (re)charge, deposits form inside the electrolyte that inhibit lithium ion transport, resulting in the capacity of the cell to diminish. The increase in internal resistance affects the cell's ability to deliver current, thus the problem is more pronounced in high-current than low-current applications. The increasing capacity hit means that a full charge in an older battery will not last as long as one in a new battery (although the charging time required decreases proportionally, as well).
    Also, high charge levels and elevated temperatures (whether resulting from charging or being ambient) hasten permanent capacity loss for lithium-ion batteries.[32][33] The heat generated during a charge cycle is caused by the traditional carbon anode, which has been replaced with good results by lithium titanate. Lithium titanate has been experimentally shown to drastically reduce the degenerative effects associated with charging, including expansion and other factors.[34] See "Improvements of lithium-ion technology" below.
    At a 100% charge level, a typical Li-ion laptop battery that is full most of the time at 25 °C or 77 °F will irreversibly lose approximately 20% capacity per year. However, a battery in a poorly ventilated laptop may be subject to a prolonged exposure to much higher temperatures, which will significantly shorten its life. Different storage temperatures produce different loss results: 6% loss at 0 °C (32 °F), 20% at 25 °C (77 °F), and 35% at 40 °C (104 °F). When stored at 40%–60% charge level, the capacity loss is reduced to 2%, 4%, 15% at 0, 25 and 40 degrees Celsius respectively.[35][citation needed]
    Lithium-ion batteries should never be depleted below their minimum voltage (2.4 to 2.8 V/cell, depending on chemistry). If a lithium-ion battery is stored with too low a charge, there is a risk that the charge will drop below the low-voltage threshold, resulting in an unrecoverable dead battery.[citation needed] Usually this does not instantly damage the battery itself but a charger or device which uses that battery will refuse to charge a dead battery. The battery appears to be dead or not existent because the protection circuit disables further discharging and there is zero voltage on the battery terminals.
    Lithium-ion batteries should be kept cool. Ideally they are stored in a refrigerator.[citation needed]
    Aging will take its toll much faster at high temperatures.[38]



    :motdroidvert: I think the problem of poor battery performance is directly

    related to cell phone coverage when the phone is looking for coverage for all

    the programs that are running i.e.wifi, bluetooth, gps and sometimes turning

    the screen on for periods of time. Check battery usage with the app -

    'Spare Parts' and use something like 'Adv Task Manager' to help shut down

    some running programs and turn off wifi etc, if not using.
     
  3. SBacklin

    SBacklin Member

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    Good info jltung. I think we all need to step outside the box for just a moment and realize that we all shouldn't even have to worry about such things. I have used or am currently using the Storm 2. I was using the iPhone 3GS. The batteries were very decent in those devices especially the Storm 2. I didn't have any complaints...well, I did with the iPhone at first but firmware updates fixed battery issues.

    Anyway, there is something definitely wrong and that being that HTC was really skimpy with the battery. If you design a device with said capabilities, we should then be able to use it accordingly without having to worry about having to plug it in to a charger so soon.

    HTC needs to come out with a VERY GOOD extended battery or a even better standard battery and maybe considering all the people complaining about the battery life, give us a free one or at least discount it with proof of purchase.
     
  4. jltung

    jltung Member

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    cell phone coverage AND battery drain

    Yesterday I was at the health club locker room and I looked at my coverage.

    It was very poor, about one bar.

    Could still call out but all the programs were running trying to find me.

    (Huge battery drain.) :icon_evil:

    Another member had 3gs coverage on his iPhone.

    I had 3G coverage as soon as I went upstairs.

    Conclusion : I suspect the droid does not have a very good individual antenna which gives less than 3G coverage where it should get 3G
     
  5. SBacklin

    SBacklin Member

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    Well, there was an update coming that was suppose to fix the signal issue. I know it was for the HTC but I'm not sure if it included the MOTO as well.
     
  6. jltung

    jltung Member

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    cell phone coverage AND battery drain

    I just read in another post that there is going to be a major upgrade to the software which will address a lot of the problems that we are having with batteries draining, cell phone coverage etc. on Dec 11.

    Can not wait !!!
     
  7. Fairfax22032

    Fairfax22032 New Member

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  8. jltung

    jltung Member

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    droid update

    I read it off a post on android forums.

    No details, just the date Dec 11.
     
    #44 jltung, Dec 2, 2009
    Last edited: Dec 3, 2009
  9. Eric

    Eric Member

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    I just picked up my Eris this past Sunday, and was told by the salesperson that several customers were complaining about the battery. She suggested the BB Storm 2, because reportedly, it has better battery life, (and was more expensive, or course.) But it just felt clunky to me, and there were many things I preferred about the Eris. Anyway, after fully charging the phone and with all the default settings, I was able to get 2.5 days out of it before completely draining the battery. I made some calls, did some e-mails and texts, and checked some things on the web. By default, lots of things were already turned off on mine (WiFi, BlueTooth, GPS satellites, etc). I didn't have much of anything running. The only app I've downloaded was a scientific calculator. E-mail checking was every 15 min, by default. Phone went to sleep in 30 sec, if I recall correctly. Anyway...I was prepared to have to bring it back, but I don't think I'm going to need to. It's been fine. I've since turned down the screen brightness, and reduced the frequency of e-mail checking to once per hour, so I expect even better performance from here. BTW, here is the report on when the upgrades are supposed to come: HTC Droid Eris OTA Update Coming Too | Android Phone Fans
     
  10. jltung

    jltung Member

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    Battery life

    Hi Eric,

    Sounds like the salesman was trying to dump a Storm 2 on you. Glad to hear that you are having good luck with your phone and battery life.

    I know there is a major temptation to play with all the apps at the same time. Looking back I would only get the ones you think you might use. The more you download the higher the chance that you will get some bug or get a program that will run your battery.

    I suspect you get good battery life because you live in an area with good 3G coverage. Lucky you.
     
  11. Eric

    Eric Member

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    ^
    Yes, I think so, too. They work partially on commission, as I understand it, so I expected that.

    Yes, I am a little uneasy about what might be lurking in all those apps, in particular, the free ones. I wonder if that is the reason why some folks are reporting that their phones are sending out phantom e-mails and phone calls.

    Coverage does seem very good here, yes, although I'm not sure how that would affect battery life.
     
  12. jltung

    jltung Member

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    Battery life

    Hi Eric,

    Some of the programs specifically gps, bluetooth, wifi and I believe TasKiller, Adv Task Killer are programmed to search for the phone periodically.

    If the program gets a good signal from your phone and vice versa, then those
    programs do not spend a lot of time looking for you, therefore saving your battery. You can check on your battery profile in the app 'Spare Parts'.

    If you try your phone with gps, etc turned on in a 'lead box' (example : hospital radiology dept etc) and watch your battery melt away.
     
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