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Prolonging battery life

Discussion in 'GENERAL Wireless Discussion' started by viewfly, Oct 23, 2006.

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  1. daleh

    daleh New Member

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    My Motorola is showing "Invalid Battery" on a rather new non factory replacement battery. Just started showing after a few months of use. Won't charge up anymore. Any suggestions?
     
  2. Jay2TheRescue

    Jay2TheRescue Resident Spamslayer
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    I only use genuine Motorola batteries. I have nothing but problems with aftermarket stuff. Buy a genuine Moto battery and it will stop. Even if they don't report as invalid aftermarket batteries usually don't last as long as the OEM ones do anyway.
     
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  3. Fire14

    Fire14 Easy,Cheap & Sleazy
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    And just to add to what Jay said, there has been a link to Non-OEM batteries causing cell phones to explode or catch on fire.
    Plus it can wipe out the warranty, if they find a non-OEM battery has been used (it's hard to prove unless you send it in with the wrong battery, but why chance it)
     
  4. viewfly

    viewfly Mobile RF Advisor
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    Nokia sent me an email newsletter that included tips for extending battery life.

    Most seemed obvious, except for one: leaving GPRS to connect only when needed. I usually leave it always on. Don't know if it does much but I'm giving it a try.


    Want to extend your battery life?

    Here's how:
    • Reduce the brightness and increase the contrast on your screen
    • Make calls only when your signal is strong
    • Set up your phone to make general packet radio service (GPRS) connects only when needed
    • Don't run multiple background applications, and use Bluetooth connectivity sparingly
     
  5. Fred333

    Fred333 Junior Member
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    Very good recommendations. I will have to take a look at all the unnecessary features that could be hurting my battery's life.
     
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  6. RJB

    RJB Gold Senior Member
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    Wirelessly posted (Mozilla/4.0 (compatible; MSIE 6.0; Windows 98; PalmSource/Palm-D062; Blazer/4.5) 16;320x320)

    very nice info in this thread
     
  7. RadioEngineer

    RadioEngineer Junior Member
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    The other factor is the quality of the signal the phone "sees". Cell phones adjust their output power dynamical in response to the received signal strength "RSSI". This dynamic interation means that if you are in a shielded area, such as inside your home or office, the output power off your phone is at maximum battery drain.
    If you use a local amplified system with an efficient outside antenna in your car or building, the phone's battery life will increase substantially because it will sense a strong signal and reduce output power. The phone's output will be conversely boosted to the outside antenna as well restoring the balance to the cell carrier site [if the amplifier is of decent quality and has some smarts embedded into it].
    We provide amplified antenna systems for homes and businesses.
    Have a Five Bar Day,
    Bill
    IIII's R Us..
     
  8. RJB

    RJB Gold Senior Member
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    You know here is something I did a long time ago when signal was not so good in my life lol. If you are at your home and can put your phone on the window seal that can help your RF and thus help your battery at times. This might be silly to some but it did me wonders.
     
  9. R32VW

    R32VW Senior Member
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    I was reading the OP and was surprised to see that OEM Nokia chargers like the AC-3U do not shut off once the battery has been fully charged (or should my 6126 be "smart" enough, in my view, to stop the charge?). I have left my phone on charge overnight but will stop now.
     
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  10. RJB

    RJB Gold Senior Member
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    I always leave my phone plugged in over night. I know I should no do this but after years of having phones and doing the same thing, nothing has happened. I just dont want to charge it in the evening then leave it unplugged all night then get to my busy day. I like to know it is fully charged when I walk out my door.
     
  11. RadioEngineer

    RadioEngineer Junior Member
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    RJB- just charge it normally; the phone should cut off the charger before there is an issue.
    Unlike a Ni Cad pack, it is OK to "top off" a Ii-ion battery that is almost fully charged before use. Once a Li-ion reaches full charge, it is full and the charge must be terminated internally in the pack controller or there is grave danger of an explosion, so your habitat of leaving it plugged in is very unlikely to cause issues.
    The battery pack itself will have [by regulatory requirements] a safety circuit inside the pack itself that cuts off excessive charging in order to prevent explosions. It is irrelevant if the random Wall wart has the smarts to compliment the battery back's internal safety algorithm, because us OEMs have to assume the worst and compensate for attempts at using disallowed devices to be employed as chargers by the end user, Quality battery packs have an encrypted charger/battery challenge/response key that must be satisfied by the proper OEM charger, and the charger will also has the same in inverse, before the charge can begin, to prevent safety liability issues caused by "clone batteries" or aftermarket chargers.
    Have a Five Bar Day!
    Bill
    Signal Bars R Us - take a look at our new website layout!

    .
     
  12. viewfly

    viewfly Mobile RF Advisor
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    I think you are probably OK with leaving the charger in all night. In my post on 10/31, I summed the residually measured 3ma after the complete charging cycle this way:

    " If I had to interpret Nokia's manual warning about not leaving the charger in, it would be this: Probably the phones charger electronics terminates the charging cycle completely, and the small non pulsing 3mA draw we measured is not going to the battery. The charging algorithm is on 'standby' and not consuming much power."

    My only caveat lector ('let the reader beware') was this:

    "So this is ok. However, if you leave the charger in (or constantly disconnect and reconnect during the day), and the phone is on, normal battery drain with the phone in standby, at some point will cause the charger cycle to start again, and this will pump a lot of current into an otherwise fully charged battery. That's not good. I've noticed this when I would charge my phone overnight (with the phone on; phone off is a different situation): The phones display and 'beep' would wake me up several times during the night, saying that it's 'fully charged'. So perhaps this is part of Nokia's warning."

    Just my suggestion.

    Best,

    P.S. RadioEngineer, very interesting and useful information. Welcome to WA Forums!
     
  13. Jay2TheRescue

    Jay2TheRescue Resident Spamslayer
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    I have always charged my phones overnight, no matter if it was actually needed or not. I used to have problems with the old NiCad batteries in my StarTac, but with the new Lithium Ion batteries I have had no problems. Charging overnight makes sure I will be able to function a full day without the battery running out on me. Even if it was bad for the battery I would still do it. I would rather have to buy a new battery every year than have the battery die in the middle of the day because I didn't charge the night before because I was trying to save the battery.

    -jay
     
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  14. viewfly

    viewfly Mobile RF Advisor
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    Sounds good. I normally charge in the morning, while I shower, etc. Doesn't take to long really.
    I agree, charge overnight if that works better for you.
     
  15. dayrun

    dayrun New Member

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    I was told that when you first get a new battery you should completely charge the battery and let it completely deplete and then recharge 3 times to "train" the battery correctly and prolong it;s life. It's especially important as the battery gets closer to the end of its life. Is this incorrect? :confused:
     
  16. RadioEngineer

    RadioEngineer Junior Member
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    That advice applies to only Ni-Cad and NiMH batteries which exhibit a characteristic called charge memory. Modern Lithium ion types do not require user intervention for charge management and do not exhibit this memory effect. With these modern batteries, the charger and the battery work together automatically to manage the battery. It is even OK to "top off" a lithium ion battery, and they do not need a "keep alive trickle charge" after being charged fully and rapidly.
    Bill Signal Bars R Us
     
  17. viewfly

    viewfly Mobile RF Advisor
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    You are right. But you only do that with a new Li-ion battery, the type used today in phones. After that, do not let it get to deep discharge very often. It is better to charge frequently, even with only a partial discharge. Li-ion batters have no memory to worry about.

    From the Nokia phone manual, Nokia 6131:

    Charging and discharging

    "Your device is powered by a rechargeable battery. The full performance of a new battery is achieved only after two or three complete charge and discharge cycles. The battery can be charged and discharged hundreds of times, but it will eventually wear out. When the talk and standby times are noticeably shorter than normal, replace the battery. Use only Nokia approved
    batteries, and recharge your battery only with Nokia approved chargers designated for this device."

    Best,

    VF
     
  18. RadioEngineer

    RadioEngineer Junior Member
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    Thanks Viewfly for providing the actual OEM information.
    I have never seen that advice regarding Li Ion batteries before. I am curious why Nokia does not "train the batteries" at the factory when shipping the new batteries. It does not make sense to me for the end user to have to do this, or why the heck they even ask this to be done at all. This is not the first time I have seen OEM advice I find questionable in user manuals. This will not harm the battery, but I see no reason for the procedure from my experience with these batteries in other applications
    Beyond overcharging to the point of explosion, deep discharge is the real killer of Li Ion batteries and the phone power management should prevent both situations from occurring.
    Bill Signal Bars R Us
     
  19. viewfly

    viewfly Mobile RF Advisor
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    I think the confusion is in the Li Ion's power management system of the phone and other devices (pc's).

    Yes, I've seen mistakes in OEM manuals from time to time also. I don't believe that this is one. But I feel they are addressing 'recalibration' of the battery internal microelectronics ( that tell the phone the state of the battery charge, and protect it from deep discharge) and not really 'conditioning' of the battery cells. And here lies the confusion. Look at my first post here from the 'Battery University'.

    So some say that Li-ion do not respond to deep 'conditioning'. True. In fact, Li-ion can afford only 300 or so full deep discharges over their lifetime...but considerably many more partial discharges. But the bottom line, if you don't even use the battery at all, the internal chemistry will kill it regardless in 3 years or so.

    The best that I can figure, is that the internal battery electronics need to be reset so it understands what 'full' and 'discharged' really is. That measurement will shut down the phone regardless if the battery still has juice in it.

    This is supported by not just Nokia, but Dell, Apple, and sites that sell batteries. But I do think that some sites think they are helping the battery. I have it on good personal advice there is some truth to this, but mostly, or in addition to this, is the 'calibration' effect for a new battery. As seen in the first post (and by Apple below), they recommend perhaps every few month for calibrations.

    See these sites, Apple: Calibrating your computer's battery for best performance

    "You can calibrate your iBook, PowerBook, MacBook or MacBook Pro computer's lithium ion battery for best performance.

    The battery has an internal microprocessor that provides an estimate of the amount of energy in the battery as it charges and discharges. The battery needs to be recalibrated from time to time to keep the onscreen battery time and percent display accurate. With all iBooks and PowerBook G4 computers except the aluminum PowerBook G4 (15-inch Double-Layer SD), you should perform this procedure when you first use your computer and then every few months thereafter
    ."

    And this from Dell Tech support page: Dell - Support

    "No. The new lithium-ion batteries do not acquire a false memory of the charge level and do not have to be fully discharged periodically like the older notebook batteries did.

    You may need to recalibrate the battery from time to time. Recalibrating the battery maintains the accuracy of the main-battery indicator on the status display panel, the charge gauge on the main battery, and the battery status icon."


    And that is basically a full discharge done by a software program on the Dell's. So 'recalibrating' the battery is not really effecting the battery itself, but the 'system' that makes up the battery pack; battery + protection electronics. The electronics are being 'Trained' not the battery exactly. Batteries are stored at 40% charge rate, and deteriotate on the shelf. So a new user would want to fully charge and then discharge at least one time. I'm not really sure why it is necessary to do it twice right away.

    But, take heart, if you do nothing, the batteries will still perform well for most people. And that is probably why mfgr. don't like to talk about the details that much.

    That the best of my current understanding,

    Best,
    Viewfly
     
    #49 viewfly, Jan 9, 2008
    Last edited: Jan 9, 2008
  20. RadioEngineer

    RadioEngineer Junior Member
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    AH HAH
    Thanks-- that makes perfect sense to me now.
    Designing with a lithium battery pack has become an art to itself. It still amazes me we have reached the point where a microprocessor is casually specified to be integrated into a battery pack that is essentially disposable.
    Bill Signal Bars R Us
     
  21. viewfly

    viewfly Mobile RF Advisor
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    You're welcome.

    Whether it is improperly called conditioning and is really calibration, the end result is the same - Maximize the talk/standby time of your Li ion battery

    Perhaps doing more than 1 cycle for the new battery helps get the full range of the battery. Since the electronics will cut out before the battery is fully low, each cycle gets the battery a little bit more fully discharged, to perform the calibration correctly.
     
  22. viewfly

    viewfly Mobile RF Advisor
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    Some tips from Apple on extending the battery life and battery lifespan of the iPhone. Generally it applies to all mobile phones.

    See Apple's battery tips here: Apple - Batteries - iPhone A very informative web page.

    Summary:
    Avoid excessive heat in storage or during charging
    Change Mail Auto-Check
    Turn off Push Mail
    Auto-check fewer Mail Accounts
    Turn off Wi-Fi
    Turn off Bluetooth
    Adjust Brightness
    Turn off EQ

    AND last but not least, this advice:

    Use iPhone Regularly
    "For proper maintenance of a lithium-based battery, it’s important to keep the electrons in it moving occasionally. Be sure to go through at least one charge cycle per month"

    A subject of recent posts in this thread.

    VF
     
  23. jerry 12

    jerry 12 Junior Member
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    this is from my motorola v3c manual / you can safely leave the charger connected to the phone after charging is complete. this will not damage the battery. :)
     
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  24. gc0005

    gc0005 New Member

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    For extreme cases we should all have backup batteries because we never know in fact if we charge it so much batteries can burn and damage your equipment for that matter i always have backup batteries.

    gc0005


    link deleted
     
    #54 gc0005, Aug 22, 2008
    Last edited by a moderator: Aug 22, 2008
  25. Kyle2008

    Kyle2008 New Member

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    Battery research is focusing heavily on lithium chemistries, so much so that one could presume that all portable devices will be powered with lithium-ion batteries in the future. In many ways, lithium-ion is superior to nickel and lead-based chemistries and the applications for lithium-ion batteries are growing as a result.
    =========================
    Kyle
    Our mission is to provide high quality end to end solutions to the BPO segment in a manner that will improve the operational efficiency while reducing the cost of the services to the client.
     
    #55 Kyle2008, Oct 23, 2008
    Last edited by a moderator: Oct 23, 2008
  26. malchiang

    malchiang New Member

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    how can I make my nokia battery last longer[​IMG]
     
  27. Batteries4Less

    Batteries4Less New Member

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    The above tips should help any "carriers" cell phone. It is the chemistry of the battery and corresponding model type that determine what needs to be done to extend the life of the battery.
    Good Luck!
     
  28. Batteries4Less

    Batteries4Less New Member

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  29. Magneto

    Magneto New Member

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    hey guys .. if am using this 860mAh battery for my cellphone , how is the max talk time calculated actually? I believe its got something to do with the current drawn in standby mode nd that drawn during a call.. but am not sure how its done ..
     
  30. Balistix

    Balistix New Member

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