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  1.    #1  
    How fast is the drain on a spare battery? I fully charged my newly arrived spare (which was at 49% on arrival) -- and after 3 days put it back in the Treo 650 in to check and it was still at 99%.

    Anyone done a timeline on this? It is looking like I might only have to check and top it off only once a month.

    Cheers, Perry.
    Last edited by gtwo; 05/23/2005 at 09:58 AM.
  2. #2  
    According to RatShack, Li-ion batteries lose less than 0.1% per month.
    Palm Pilot Personal -> Palm III -> Palm IIIx -> Visor Prism -> Clie TJ37 -> Treo 650 -> GSM Centro
  3. #3  
    i haven't had any problems at all, only using my spare about once a month, the rest of the time in my briefcase.
  4. buirus's Avatar
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    #4  
    I just put in my spare after not using it for 2 months. It shows 99% charge on the Treo. Pretty darn cool!
  5.    #5  
    Quote Originally Posted by jetkins
    According to RatShack, Li-ion batteries lose less than 0.1% per month.
    Thanks, Jetkins!


    Obviously, they did not fully charge my spare at the time of manufacture . . . . . . . .
    Let's see, 51 point loss times 10 = 510 months = 42.5 years of storage. . . .

    Anyway, I will track it for awhile. Only dropping 1 point (99 to 98%, et cetera) every 10 months seems alittle optimistic on Radio Shack's part.
  6. #6  
    Quote Originally Posted by Perry Holden
    Obviously, they did not fully charge my spare at the time of manufacture

    Anyway, I will track it for awhile. Only dropping 1 point (99 to 98%, et cetera) every 10 months seems alittle optimistic on Radio Shack's part.
    I read somewhere else that the optimal charge level for long-term storage is around 40%. Perhaps that's why they ship them somewhere around half-charged.

    But I can confirm that Li-ions do hold a charge exceptionally well. We have a camcorder which gets used once in a blue moon - I charge it up after each use, and it always still has a 98%+ charge when I go to use it months later.
    Palm Pilot Personal -> Palm III -> Palm IIIx -> Visor Prism -> Clie TJ37 -> Treo 650 -> GSM Centro
  7.    #7  
    Thanks, Again!

    Wonderful, I can throw that puppy in the travel bag and forget about it.

    Cheers, Perry.

    (That brings up a funny story. Forgot my wall charger, 1 day plane trip turned into 3, my Tungsten T3 was down to 30%, didn't want to pop for a new charger, went to a Best Buy and charged my T3 at the PDA display stand!)
    Last edited by gtwo; 05/23/2005 at 11:57 AM.
  8. #8  
    Quote Originally Posted by Perry Holden
    Thanks, Again!

    Wonderful, I can throw that puppy in the travel bag and forget about it.

    Cheers, Perry.

    (That brings up a funny story. Forgot my wall charger, 1 day plane trip turned into 3, my Tungsten T3 was down to 30%, didn't want to pop for a new charger, went to a Best Buy and charged my T3 at the PDA display stand!)
    I've done the best buy quick charge before, it is a life saver.
  9. pump142's Avatar
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    #9  
    lol ..how long did you wait? and how much juice did you get?
  10. #10  
    the Quick charge systems supposedly screw up your battery. Also, I don't think its right in assuming battery leak is a linear function and optimal long term storage of LION is at around 50% or you might lose capacity over time. You have to keep the LION batteries in some sort of charging or use at least once a month so as not get things "stale".
  11. #11  
    For more information that you probably want to know, check out www.batteryuniversity.com

    (Though that site says Li-ions lose about 5% in the first 24 hours - a behaviour I've never observed.)
    Palm Pilot Personal -> Palm III -> Palm IIIx -> Visor Prism -> Clie TJ37 -> Treo 650 -> GSM Centro
  12.    #12  
    Quote Originally Posted by pump142
    lol ..how long did you wait? and how much juice did you get?
    In regards to our "Best Buy" quick charge escapades in posts #7 & #8 above . . . . . .

    Down to 30%, clerks took pity on me and let me stay 10 minutes after closing to get it to 99%. (Took 35 minutes total.)

    Cheers, Perry
    Last edited by gtwo; 05/23/2005 at 10:08 PM.
  13. pump142's Avatar
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    #13  
    nice
  14.    #14  
    Quote Originally Posted by flypenfly
    the Quick charge systems supposedly screw up your battery. Also, I don't think its right in assuming battery leak is a linear function and optimal long term storage of LION is at around 50% or you might lose capacity over time. You have to keep the LION batteries in some sort of charging or use at least once a month so as not get things "stale".

    Well put !! That was my plan, a once a month swap between my two batteries (the one in the Treo and the one in the travel bag).

    Thanks, Perry.
  15. Biggles's Avatar
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    #15  
    What is the most efficient method of spare battery management?

    If, as advised, the best method of looking after a battery is to charge it daily, should the batteries be rotated (eg weekly or monthly) or is it best to keep one as a spare, hardly ever used, and one for regular use?
  16.    #16  
    Quote Originally Posted by Biggles
    What is the most efficient method of spare battery management?

    If, as advised, the best method of looking after a battery is to charge it daily, should the batteries be rotated (eg weekly or monthly) or is it best to keep one as a spare, hardly ever used, and one for regular use?

    You always want to keep the battery in the Treo "topped" off, rather than draining it fully and then recharging -- it is my understanding that the battery will last longer that way.

    As for the spare battery: Mine was still at 98% after 1 month of storage, but I am going to follow a once a month swap between the two batteries scenario to keep them both in a "use" mode. I read else where that this is a good strategy as well -- to maintain both battery's longevity.

    Cheers, Perry.
  17. Biggles's Avatar
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    #17  
    As for the spare battery: Mine was still at 98% after 1 month of storage, but I am going to follow a once a month swap between the two batteries scenario to keep them both in a "use" mode. I read else where that this is a good strategy as well -- to maintain both battery's longevity.
    Cheers for that. A monthly swap was to have been my plan, but I thought I would seek a second opinion first in case that wasn't the best strategy.

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