Battery life.

Discussion in 'Digital SLR' started by Roger, Nov 18, 2004.

  1. Roger

    Roger Guest

    I cross posted this to the 4 digital groups as it pertains to all.

    It's been about 2 1/2 years since I went digital, first with the Oly
    E20-N and now the Nikon D-70.

    I started out with two sets of AA NiMH batteries and added a third.
    One set consisted of 8 2000 MAh batteries, one set of 4 1800 MAh,
    batteries and one set of 4 1850 MAh batteries.

    One of the early 2000 MAh batteries failed early on. Not too long ago
    a second failed. In the last week I had one fail in each of the other
    two batches.

    They were heavily used at first, but since the D-70 have received only
    occasional use. They have been conditioned twice in the last year.

    I didn't name any brands as the failures seem to be pretty well
    distributed between on and off brands.

    Considering the cost of NiMH batteries, I think I ended up with
    reasonable life out of them.

    Likewise the rechargeable Lithiums are rated with both a cycle life
    and calendar life. The proprietary battery with the D-70 seems to
    have tremendous capacity, or longevity, but it's life is still rated
    in the neighborhood of two years.

    Roger Halstead (K8RI & ARRL life member)
    (N833R, S# CD-2 Worlds oldest Debonair)
    www.rogerhalstead.com
    ..
     
    Roger, Nov 18, 2004
    #1
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  2. Roger

    peter Guest

    Interesting. I've yet to find a digicam that draws much less than ½ amp
    with the display on. Even my tiny Dimage-X pulls 400+ mA, but only about
    6 mA with the display off, so the current delivering ability of a
    battery of whatever type is all important. I've found the big battery
    killer is overcharging. The practice of "topping up" a full battery
    before a shooting session can be B A D ! Most chargers doing this won't
    sense an overcharge before some electrolyte is destroyed, leading to a
    battery with apparent full capacity, but reduced current ability. Of
    course charging from flat allows the better chargers to predict the end
    point and stop in time. I agree that the cost of NiMH cells is low
    enough that the life is acceptable, provided you have a spare set for
    when the inevitable happens and a fully charged set fails in camera.
    The Lithium ion type can have exactly the same vulnerabilities, and they
    are expensive
     
    peter, Nov 18, 2004
    #2
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  3. Roger

    Bob Shomler Guest

    About two years with moderate to high use has been my experience with
    Li-ion batteries for Canon's D60 and 10D.

    Bob Shomler
    www.shomler.com
     
    Bob Shomler, Nov 18, 2004
    #3
  4. ----

    The great 'dedicated' battery rip-off is why I'm seriously considering the
    new Pentax *ist DS - uses AA's.

    Proprietary batteries are a curse - whether they are for laptops, video
    cameras, or still cameras. Full marks to Pentax for building a camera that
    uses an inexpensive future-proof power source.
     
    Conan The Librarian, Nov 19, 2004
    #4
  5. Roger

    Keith M Guest

    Hi all

    As a point of interest the guy in Jessops (Canterbury) also said that
    topping up was a bad idea until the batteries had been conditioned. Ths
    entails fully chaging then fully discahrging them 4 times. Discharge them by
    normal use and dont force the issue by up loading vast amounts of data to
    your PC - no topping up charges in this time .

    This is supposed to considerably extend the useful life of batteries .

    Keith M
     
    Keith M, Nov 21, 2004
    #5
  6. Roger

    news Guest

    Hi All:


    Some points about Lithium cells.
    Lithium cells are very different from NiCad or NiMH cells.

    1- Lithium batteries have a shelf life, they will go bad wither they are
    used or not. How long the shelf life is depends on the manufacture and the
    design of the batteries. This is a good reason not to buy used or old
    lithium batteries.

    2- Lithium batteries have a limit on of the number of times they can be
    completely discharged and re-charged. This is about 500 to 1000 times
    depending on the manufacture and the design of the cell. Un-necessarily
    completely discharging a Lithium battery wastes life of the battery.

    3- Lithium do not have any memory effect. In fact the best way to extend the
    life of the cell to the maximum the self life will allow is to keep them
    fully charged. It is best to keep them in the charger and fully charged.
    Lithium batteries in the proper charger can not be over charged.

    4- Charging a lithium battery in a charger not designed for that battery
    risks a fire. Without proper charging lithium batteries can explode or burn
    up.
     
    news, Nov 21, 2004
    #6
  7. Roger

    Damir Ulovec Guest

    (Almost) everything about batteries that you want or need to know you may
    found on:
    http://www.buchmann.ca/
     
    Damir Ulovec, Nov 22, 2004
    #7
  8. Roger

    MTBike1970 Guest

    My 2 & 1/2 year old Lithium Ion batteries..original Canon G2 batteries, are
    on their last legs.... I can coax about 100 shots on a full charge..vs 300
    shots when they were new. A bit irritating considering their price...
    Another good website about batteries is .....
    http://www.batteryuniversity.com/index.htm

    cheers....MTB
     
    MTBike1970, Nov 24, 2004
    #8
  9. Generally Li-on batteries last about 2 years after manufacture before they
    start degrading, so it sounds about normal. Unfortunately if the manufacturer
    of your camera didn't use a standard battery type, it may be expensive to
    replace the battery after the model is no longer sold.
     
    Michael Meissner, Nov 24, 2004
    #9
  10. Roger

    MTBike1970 Guest

    I got lucky here... the battery used in the G6 will work in my G2, so I'll
    probably get one soon...a battery that is...not sure if I'll get the G6.
    MTB
     
    MTBike1970, Nov 24, 2004
    #10
  11. Canon generally tries to reuse the same battery across generations, but not
    every company does so.
     
    Michael Meissner, Nov 25, 2004
    #11
  12. As this thread is of general interest, it might be better being in just
    rec.photo.digital, rather than in the four new group. Please consider
    trimming the cross-posting accordingly.
     
    David J Taylor, Nov 25, 2004
    #12
  13. Roger

    Ken Ellis Guest

    Good thread. I just got a 20d and was wondering if i should buy a 2nd
    battery. The aging issue concerns me. I don't suppose theres really
    any way to forestall that. It seems to charge pretty quickly and i
    keep a power converter in the car to plug into the lighter and
    recharge while to - and -fro.

    rgds

    Ken
     
    Ken Ellis, Nov 25, 2004
    #13
  14. Roger

    Charles Guest

    Always carry a spare battery. If the charge runs out while you are
    shooting you won't have time to recharge.
     
    Charles, Nov 25, 2004
    #14
  15. Roger

    Alan Browne Guest

    Wholeheartedly and enthusiastically concur and encourage others to heed David's
    advice.


    --
    -- r.p.e.35mm user resource: http://www.aliasimages.com/rpe35mmur.htm
    -- r.p.d.slr-systems: http://www.aliasimages.com/rpdslrsysur.htm
    -- [SI] gallery: http://www.pbase.com/shootin
    -- [SI] rulz: http://www.aliasimages.com/si/rulz.html
    -- e-meil: there's no such thing as a FreeLunch.
     
    Alan Browne, Nov 25, 2004
    #15
  16. Roger

    Ken Ellis Guest

    Better safe than sorry..makes sense

    Ken
     
    Ken Ellis, Nov 25, 2004
    #16
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