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how to not use the batteries in my light

Discussion in 'Electronic Repair' started by [email protected], Feb 27, 2007.

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  1. Guest

    hey everyone, i was just wondering if there's a way to not use the
    batteries on this light that i have and use an adapter of some sort,
    or would i even need an adapter? I think it's an LED light that
    changes colour and i would like to keep it up permanently. I'm not
    sure what batteries it uses, but the back of them says LR44 button
    cell. Thanks in advance everyone!
     
  2. hr(bob)

    hr(bob) Guest

    How many batteries does it use? I think the LR44 is a 2V battery, so
    if it uses two LR44's you would need a 4V DC wallwart type of adapter,
    with a current of 100 milliamperes or more to power the light.

    H. R. (Bob) Hofmann
     
  3. Guest

    Just popped in to the Radio Shack website. They sell a 300 milliamp
    regulated wallwart with switchable output voltage from 1.5 to 12 volts
    for $18 or so. Of course with those, you gotta be careful you don't
    accidentally switch it to a higher voltage than your device can
    tolerate.

    Jerry
     
  4. My local Dollar and More store sells those for $8. They also sell a 2.1 amp
    digital camera model (with specific voltages) for the same!
     
  5. My local Dollar and More store sells those for $8. They also sell a 2.1 amp
    digital camera model (with specific voltages) for the same![/QUOTE]

    Also note that these are often not regulated. So, the actual output voltage
    at any given setting will depend significantly on the load. If being used
    to power s decive that expects a fixed voltage, start low while measuring
    the voltage and then work up grom there.

    Or, get a regulated adapter.

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  6. That's what I do. Start off low and crank it up until it works/charges.


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  7. Jim Yanik

    Jim Yanik Guest

    LR44s are 1.5V.
    Those LED lights use THREE LR44s,for a total of 4.5v
     
  8. Guest

    Thanks for all the suggestions everyone! Yup it does use 3 LR44
    batteries. I actually have some adapters lying around with adjustable
    voltage, do i just cut the wires, set the appropriate voltage, and
    attach the 2 ends to the + and - in the battery compartment with
    electrical tape? Would that be a waste though? Maybe i should go check
    out my local dollar store to see what they got. Sorry I don't usually
    do these types of stuff so it might not sound like i know what i'm
    doing, thanks again!
     
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