What type of battery should I use?

Discussion in 'General Electronics Chat' started by buzaiandras, Mar 18, 2012.

  1. buzaiandras

    Thread Starter Member

    Jul 18, 2011
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    Hi all,

    I need to build a battery powered digital thermometer that will operate at a low temperature for about 4-5 months (it will be placed outside at a -20 to -30 degrees Celsius).
    What type of battery do you recommend for this low temperatures?
    Which type of battery last longer (and operates normally) at such low temperatures? The circuit will operated at 3-5V and (in worst case) it will consume a current of about 2-4mA.

    Thank you,

    Buzai
     
  2. MrChips

    Moderator

    Oct 2, 2009
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    I have used 6V alkaline lantern batteries to power data loggers that were required to run for 12 months in sub zero temperatures.

    Your objective should be to reduce the current drain below 1mA. You can do this by using very low power microcontrollers that spend most of their time in sleep mode and are powered on occasionally (e.g. once each minute) to take readings.
     
  3. bertus

    Administrator

    Apr 5, 2008
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  4. Markd77

    Senior Member

    Sep 7, 2009
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  5. KJ6EAD

    Senior Member

    Apr 30, 2011
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    I used to collect my companion's "dead" alkaline batteries on cold weather backpacking trips. Of course, the batteries still had half their energy once they got home and warm. :D
     
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