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  1. #1
    Registered User
    Join Date
    Feb 2008
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    4

    Battery Management

    It is nice to learn everything from all of you . But, in
    those discussion topics, I can't find anything related to
    battery usage .

    Does no one care about the battery status, especially for 3G
    or 3.5G cellular phones? I usually encounter the problem that
    when battery shows 90% but actually, the battery can only
    sustain for less 3 hours. It can't be acceptable because I am
    buying and selling stocks every hour . After stock market
    close, I have to deal with my business everywhere. Once my
    cellular phone can't show the correct battery capacity, I have
    no idea how many batteries I have to carry everyday. Even, when
    I play some music,watch cell-TV, typing documents, talking with
    some important persons or MSNing someone happily, if the battery
    goes down abnormally, everything will be in a mass.

    As I know, cellular phone makers can help us solve the
    problem using hardware solution, why don't cellular phone makers
    help us ? The hardware solution is cheap compared to the
    sell price of cellular phone.

    I would like to ask a question to all of you, please kindly
    help me with the question :

    Is it acceptable for all of you to pay 2 more USD to buy such
    kind of solution when you buy a 3G or 3.5G cellular phone?

  2. #2
    Super Contributor
    Join Date
    Mar 2003
    Location
    Finland
    Posts
    9,569

    Re: Battery Management

    You can use the Nokia Energy Profiler to see what S60 3rd Ed. (Symbian) devices use battery power for:

    http://www.forum.nokia.com/info/sw.n..._0_en.zip.html

  3. #3
    Registered User
    Join Date
    Feb 2008
    Posts
    4

    Re: Battery Management

    Thank you Petrib for your information.

    Actually, it is ok to measure the battery capacity for most of the cases
    but in some special cases, any host solution will not be ok.
    Batteries have aging factor and most of the users have 2 batteries for 1
    cellular phone. Host solution can't recognize which battery is inserted
    so the host will use the ideal algorithm calculating the battery capacity.

    When battery is inserted, the battery capacity estimation for this time
    will not be so precise due to battery aging characteristic. So, there
    might be a battery capacity % jump when displaying the battery capacity %
    for the insertion.

    This is what I concern. Because in this case, I have to suffer from money
    lose if the stock buying/selling point disapperred. Even I remove the
    battery in the cellular phone and insert another battery, the problem
    might be happened again.

    Not only me, but also some of my friends suffer from the problem because
    they will miss the best point to buy/sell stocks.

  4. #4
    Registered User
    Join Date
    Dec 2006
    Posts
    2,280

    Re: Battery Management

    Hi BatteryMan,

    I'm not really sure what you are requesting here? A physical hardware battery meter?

    You seem to have a reasonable understanding of the physical issues but you should note that you could really have 90% battery left and then it all be gone in 3 hours. It depends on what you do with the phone in those 3 hours. I'm sure that in many cases the battery level is not 100% accurate. However, if you are carrying more than 1 battery and flattening them all in a day then try 1 more (and don't buy the cheap copy batteries as backups if it's critical you have a connection - some are OK but many are not). If you really use more than 3 batteries in a day then you should perhaps consider a portable charging device - there are many available, that way you don't have the down time while changing batteries.

    Finally I'd recommend to anyone not to do high value stock transactions via a cellular connection - networks can and do drop connections, fully charged battery or not!

    Sorcery

  5. #5
    Nokia Developer Moderator
    Join Date
    Sep 2004
    Location
    Tampere, Finland
    Posts
    11,359

    Re: Battery Management

    It looks to me that BatteryMan is only interested in the stock value of one particular company, a hardware battery measuring system producer

    Anyway, this discussion is pointless as nobody here is a phone manufacturer or a decision maker for one such entity.
    Last edited by ltomuta; 2008-02-27 at 16:47. Reason: Corrected typo
    -- Lucian

    If you are not yet a DVLUP member it is time to correct that mistake :) Click here to join: http://www.dvlup.com/lucian/Invite

  6. #6
    Super Contributor
    Join Date
    Mar 2003
    Location
    Finland
    Posts
    9,569

    Re: Battery Management

    Ah! Could be. Just a slightly more creative spam message selling technology to potential buyers that are not even here.

  7. #7
    Registered User
    Join Date
    Feb 2008
    Posts
    4

    Re: Battery Management

    I am sorry that I should mention the topic clearly.

    My topic should be "Why not use battery gauge solution to provide end-users a more reliable battery capacity estimation?"

    Itomuta is 90% correct about the stock price of certain company. Because I am interesting in certain company's development. I would like to
    buy their stock. But, before that, I would like to listen to users' opinion about their concept. Before buying, analyzing first ^^

    Another 10% is really my friends' and my problems. We usually use PDA to
    buy/sell stock because it is very normal and convenient in my country. We
    can use PDA everywhere and the software of the PDA for stock is very good
    now. You can check everything you want except inside-news ^^". So, the battery problem becomes a big problem for us. We bought one PDA 1 year ago
    and now, it usually power off even the battery capacity shows 30% or even higher.

    We think this is PDA manufacturers' responsibility especially after I listen to the battery gauge company's engineers told me about the gauge function. I really doubt why the cost is not so high but the manufacturers don't pay for it for end users.

  8. #8
    Nokia Developer Moderator
    Join Date
    Sep 2004
    Location
    Tampere, Finland
    Posts
    11,359

    Re: Battery Management

    I'm usually 100% right but in your case I'm ready to concede to a 99%

    Try http://discussions.europe.nokia.com
    -- Lucian

    If you are not yet a DVLUP member it is time to correct that mistake :) Click here to join: http://www.dvlup.com/lucian/Invite

  9. #9
    Registered User
    Join Date
    Feb 2008
    Posts
    4

    Re: Battery Management

    Thank you Itomuta. I will check the discuss group you provide. Since we are investors, we have to care all information. It is very remarkable that you just read only one of my message but figure out what I really want to say and care. I should learn such kind of skill from you.

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