9V battery capacity question


Closed Thread
Results 1 to 3 of 3
  1. #1
    Join Date
    May 2007
    Location
    Area 71
    Posts
    52

    Default 9V battery capacity question

    I am planning to use a 9V battery for my XBPro power supply .
    How long a fresh 9V last ? The consumtion is around 300mAH

    Has anyone experience powering XBPro with 9V batery / Thanks

  2. #2
    Join Date
    Jul 2003
    Posts
    2,358


    Did you find this post helpful? Yes | No

    Default

    There are 9v Batteries and then there are 9v Batteries... which one is yours?

    If you take the typical PP3 style just as an example (aka 0068, 6F22, 6LF22, 6LR61, A1604 etc etc) then at one extreme it comes as a Leclanche (zinc-carbon) a real cheapie, with capacities starting from as little as 150mAH - and that's from some big brand names!!!! (those should power your equipment for about 10 minutes before the terminal voltage starts seriously collapsing - assuming their internal Resistance is low enough to suck 300mA out of them in the first place), right up to Lithium Cells at the other extreme that have 1500mAH Capacity, cost 30 times the price (and should power your equiment for around 4 hours).

    Rechargeables (in that style) don't give 9v and therefore I haven't mentioned them.

    Wall cube suddenly starts looking like a nice option...

  3. #3
    Join Date
    May 2007
    Location
    Area 71
    Posts
    52


    Did you find this post helpful? Yes | No

    Default

    Thanks Melanie,

    I think I will go another way, I thought a 9v battery can supply both PIC and XBPro, but after your information, I will look for low voltage PIC , ( 3.3V / 3V maybe ? ) so I can supply from 3xAA batteries . I think those standard rechargeable AA have around 2000mAH capacity.


Similar Threads

  1. Battery powered applications
    By NavMicroSystems in forum Off Topic
    Replies: 7
    Last Post: - 22nd June 2009, 08:12
  2. Of battery discharge curves
    By ardhuru in forum General
    Replies: 0
    Last Post: - 21st January 2009, 17:24
  3. Low battery signal from an RTC
    By ardhuru in forum mel PIC BASIC Pro
    Replies: 2
    Last Post: - 19th March 2008, 18:13
  4. MAh - Battery question
    By kevj in forum Schematics
    Replies: 6
    Last Post: - 16th October 2007, 17:06
  5. 12F683 battery powered remote - energy consumption question
    By silentwol in forum mel PIC BASIC Pro
    Replies: 7
    Last Post: - 13th April 2007, 14:23

Members who have read this thread : 0

You do not have permission to view the list of names.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts