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  1.    #1  
    Since day one, 14 months ago I cannot remember a day where I didn't have to have a charging cable within arms reach. The 850 mAhr battery never cut it.
    Recently it started getting worse due to the Li-ion cell age, so I decided to upgrade. Today I have a 1700mAhr Li-ion cell installed and this thing finally acts like a "normal" phone. I get 2 days minimum use before recharge is required.

    I figured there 's be some interest in this modification so check out the 4 photos. The first one is cell size comparison, both have same footprint, but the 1700 is twice is thick. Note, in the final version I recycled the wires and plug from the 850 cell.

    GG
    Attached Images Attached Images
  2.    #2  
    Next image shows internals before and after. Initially the 850 cell is stuck to the housing with 2-sided tape, in my version the cell gets adhered to the PCB. Big hole was cut with a dremel tool.
    Attached Images Attached Images
  3.    #3  
    After re-assembly, but not 100% ready for prime time. The ugly yellow tape is Kapton tape for insurance to prevent electrical shorts. The fit is between batt and hole in the housing is snug. The last picture will show the final product.
    Attached Images Attached Images
  4.    #4  
    The Casetechworks soft leather case finishes it off. It is obviously heavier, but the final results exceeded my expectations.

    GG
    Attached Images Attached Images
  5. #5  
    WOW! Well, I must say that was pretty nifty! If I may ask, how much did that whole procedure cost?
    _________________
    aka Gfunkmagic

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  6. #6  
    That is killer! Where did you get that battery? I am thinking of trying this with my extra T180. With the mod you canot use the cradle though right? Small price to pay though!
  7. #7  
    what are the Stats now?
    Talk time, True stand by time etc.

    How much did the Battery Cost?

    Nice Work
    Build Systems, Not Products
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  8.    #8  
    The T300 forum still lives! Thanks for the interest in this mod.

    Actually no cost to me, I was lucky and got a free sample from a friend, kinda like a Monster Garage Freebie. I estimate the cell probably cost $50-60 ?? You can't buy em over the counter for just any aplication due to liability issues from the cell manufactureres. Exploding batteries due to "unapproved" applications aren't something a cell manufacturer wants to be associated with.

    I never used a cradle actually, I'm a cable guy. I'm sure it wouldn't fit in a cradle though.

    Before I found out about the high cap cell, my first idea was to use 2- 850 batteries wired in parallel to accomplish the same 1700mAhr capacity. DO NOT DO THIS! The charging circuit in the phone thinks it is charging one single cell. If 2 cells discharged and recharged exactly at the same rate forever, this could theoretically work. But in the real world the unbalanced cells would result in one overcharging which will most certainly degrade the cells at an accelerated rate. Worst case I suspect can be an exploding cell. Bottom line DO NOT use 2 cells in any device with an internal charging circuit originally designed for one battery cell.

    GG
  9.    #9  
    ClarenceCM3,
    Thanks!
    I haven't really looked at the "scientific data" yet although i have been recording the batt charge/discharge cycles with
    BatteryGraph v1.21 by Witteman
    Link is
    http://palm.JeroenWitteman.com/

    Here's some practical data
    My old battery (14 months) required 2X full charges to make it thru one day.
    Compared to:
    Today- 10 hrs on so far, 14 phones calls (avg time per call guessing 5? minutes) , say 10 application uses (schedule, calc, etc) No data service use.
    Battery is at 78%

    If any body can recommend a talk time recording app, I'll try it out and will post.
    GG
  10. #10  
    Gordon,

    Where did you purchase the 1700mA hr battery and what did it take to install it?
  11. #11  
    Guys, sit tight. I'm making significant headway on tracking down a comparable over-the-counter li-ion battery for anyone interested in doing the same thing Gordon did. Don't be fooled by the taboo of lithium batteries, there are ALOT of available options out there it's just a matter of finding the best and cheapest. I'll let everyone know what I end up ordering and the specs. It's likely going to be somewhere between 1400-1700mAh and probably cost between $20-50.
  12. #12  
    What about using the 1000 mAh for the 90/180 series?

    http://www.handspringbattery.com/

    One would think since the 300 is larger it would accomodate the other battery. 150 mAh doesn't seem like much, but it will be a fresh battery with more juice than a new 300.
  13. #13  
    Originally posted by CrazyDave
    Don't be fooled by the taboo of lithium batteries, there are ALOT of available options out there it's just a matter of finding the best and cheapest.
    Not worried about taboo, just scared about bursting into flames.
  14. #14  
    quick update:

    Purchased a 3.7V Panasonic 1550mah rechargable li-ion cell this afternoon for the amazingly affordable price of $15 + $3 shipping. Roughly the same dimensions as the stock battery only slightly thicker. Still expecting to have to modify the back cover. Would have liked to use a slightly larger cell but I couldn't pass up the price on this one and that extra 700mah will still go a long way. Will keep everyone updated as to my progress.
    Last edited by CrazyDave; 11/19/2003 at 05:33 PM.
  15. #15  
    Thanks for the info man. Good luck with that Panasonic batt. and be sure to let us know how it goes.
    []Deace
    Timmay
  16. #16  
    Does Anyone Know Where I Can Get One Of Theses Batterys?

    Thanx's
    1. LOVE GOD WITH ALL OUR HEART, SOUL, MIND, AND STRENGTH. 2. AND LOVE OUR NEIGHBOR AS OUR SELF. (even when it's tough, This is Perfection).
  17. #17  
    Quote Originally Posted by CrazyDave
    Guys, sit tight. I'm making significant headway on tracking down a comparable over-the-counter li-ion battery for anyone interested in doing the same thing Gordon did. Don't be fooled by the taboo of lithium batteries, there are ALOT of available options out there it's just a matter of finding the best and cheapest. I'll let everyone know what I end up ordering and the specs. It's likely going to be somewhere between 1400-1700mAh and probably cost between $20-50.
    i have a treo 600. but i am very interested in custom installing your own power source. definitely let me know when you get a hold of these alternative battery sources, b/c i would be interested when my li-ion battery eventually goes.
    this is a fantastic idea.
    thankss
    brian
  18. #18  
    I'm Still Waiting On This, Does Anyone Know?

    Thanks
    1. LOVE GOD WITH ALL OUR HEART, SOUL, MIND, AND STRENGTH. 2. AND LOVE OUR NEIGHBOR AS OUR SELF. (even when it's tough, This is Perfection).
  19. #19  
    i noticed that there is a small circuit board on top of the treo's original battery. Did you attach the battery to the circuit first and then attach the circuit to the pda (new batt -> circuit on orig batt -> pda power connector) or did you directly connect the battery to the power connector of the treo?

    Im very frustrated with the treo 270's battery and I intend to upgrade my phone's battery with a similar one like the nokia BLB-3 battery.
  20. #20  
    I successfully did a similar procedure, using a GP 1550mAH Li-ion battery instead of the 1700mAH batt used by Gordon-gekko. I attached the charging circuit of the original battery to the new one. Its been turned for many hours now at full brightness, always on (but radio off because I can't figure out how to attach the sim card without the back cover yet).

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