Camera battery pack voltage dropping

Discussion in 'The Projects Forum' started by lentilbake, Apr 8, 2006.

  1. lentilbake

    Thread Starter New Member

    Apr 8, 2006
    2
    0
    I have an (old but still worth keeping) Fuji Finepix 4900 which
    uses the 3.7v NP80 type Lithiunm Ion battery. The problem is that
    even with a new battery freshly charged the shooting capacity
    is pretty bad.

    I'd like to make an external battery pack to run the camera from 4 x AA sized, high capacity, NiMH batteries which would give 4.8V so I'll need to drop the
    voltage to 3.7V as efficiently as possible. I'm going to use a dummy battery to pick up the contacts inside the battery compartment and run wires to the pack.



    I'd like to know the best way of doing this with the minimum of components.

    The camera is rated at 5V 4W (from the plate on the camera bottom).

    Any help would be appreciated - not too technical, practical if possible.
     
  2. paultwang

    Well-Known Member

    Mar 8, 2006
    80
    0

    I'd just plug them in :)

    The camera is rated 5 volts

    Your 4xAA NiMH batteries are rated 4.8 volts but in reality is approximately 5.48 volts no load. ... Close enough.

    If you want 3.7 volts, use 3xAA NiMH batteries instead.
     
  3. lentilbake

    Thread Starter New Member

    Apr 8, 2006
    2
    0
     
  4. paultwang

    Well-Known Member

    Mar 8, 2006
    80
    0
     
  5. diciba

    New Member

    Mar 14, 2009
    1
    0
    Just get a new good camera battery for your camera life. i won't wate much time.
     
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