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Anyone here have a good source for Li-On flat battery pack to use in a project? — Parallax Forums

Anyone here have a good source for Li-On flat battery pack to use in a project?

Don MDon M Posts: 1,652
edited 2013-02-23 19:18 in General Discussion
I'm looking a flat pack if possible 7.4 volt somewhere around 2600mAH.

Comments

  • SRLMSRLM Posts: 5,045
    edited 2013-02-22 10:43
    Flat pack? Hobby King has a good battery selection: http://hobbyking.com/hobbyking/store/uh_listCategoriesAndProducts.asp?whl=XX&pc=&idCategory=86&curPage=3&v=&sortlist=P&sortMotor=&LiPoConfig=2
  • Duane DegnDuane Degn Posts: 10,588
    edited 2013-02-22 11:08
    HobbyKing is even better if you can find the LiPo you want in the USA warehouse. The shipping is much less and much faster from within the US.
  • Don MDon M Posts: 1,652
    edited 2013-02-22 11:59
    By flat I should have said similar in size to a large cell phone battery. Something on the order of 4" x 3" x thin (3/8") or less.
  • CuriousOneCuriousOne Posts: 931
    edited 2013-02-22 12:05
    I generally go and buy genuine Nokia BL5-C battery. Connect them in series/parralel, to get required voltage/current.
  • RDL2004RDL2004 Posts: 2,554
    edited 2013-02-22 14:06
    By flat I should have said similar in size to a large cell phone battery.

    That type of battery is generally referred to as "prismatic".

    Here is a link to a seach for "prismatic" at All-Battery.com (just as an example).

    http://www.all-battery.com/search.aspx?find=prismatic
  • Mark_TMark_T Posts: 1,981
    edited 2013-02-23 15:06
    Li-On? Do you mean Li-Ion? Note that LiPo (lithium polymer) are _not_ lithium ion and orders of magnitude less safe (fire
    during charging is a very real hazzard with LiPo)

    Lithium ion cells are encased in metal and still have fire issues (see other threads!). LiPo are in a plastic envelope and are
    inherently a fire-risk (very good battery managment is needed - all mobile phones that use LiPo have battery management
    systems to monitor the health of the battery)

    LiPo do not tolerate over-discharge, over-current, over-charge or over-temperature - so do consider the risks and battery
    manangement.

    The safest rechargeable lithium chemistry is probably LiFePO4 ("lithium iron phosphate"), BTW, which are fairly available
    now and have the added advantage of being about 3.3V
  • evanhevanh Posts: 15,948
    edited 2013-02-23 19:18
    Mark_T wrote: »
    Lithium ion cells are encased in metal and still have fire issues (see other threads!). LiPo are in a plastic envelope and are inherently a fire-risk (very good battery managment is needed - all mobile phones that use LiPo have battery management systems to monitor the health of the battery) ... The safest rechargeable lithium chemistry is probably LiFePO4 ("lithium iron phosphate")
    They are all Li-Ion. The differences in mechanical design don't even distinguish between chemistries, ie: The flat-pack LiPo's are the same unstable lithium cobalt chemistry as what's in cylindrical cased cells. The biggest difference between those two variants has traditionally being the resistivity of the electrodes due to the thinness of construction.
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