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Cordless Phone Battery Question

Discussion in 'Electronic Basics' started by Mike, Dec 14, 2005.

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  1. Mike

    Mike Guest

    Hi All!

    Seasons Greetings ...

    I have a quick question regarding my 900MHz Uniden Cordless phone. The
    handset is using a 3 cell Nickel Cadmium 3.6V 600 mAh battery pack which
    essentially dead now. I found a replacement at a local retail store
    however I was also looking at a comparable Nickel Metal Hydride 3 cell pack
    boasting 1300mAh of capacity. ... and at the same time won't suffer from
    "memory" loss.

    Now the question:

    Without having more technical data on the cordless handset and its current
    requirements (i.e. current slew rates, etc), should I be able to use a NiMH
    pack in this phone with the same basic characteristics (ie 3.6V and at least
    600mAh)? Are there any other considerations, like the charging circuit, etc
    that I need to address? The charging circuit would be designed to charge a
    NiCd pack. Are these charging circuits generic enough to charge a NiMH pack

    Thanks in advance!

  2. Dan Hollands

    Dan Hollands Guest

    Unless you know that the charger was designed to charge both NiCd and NiMH
    batteries it is NOT a good idea to replace one with the other. Unlikely that
    the phone charger would have been designed for both.


    Dan Hollands
    1120 S Creek Dr
    Webster NY 14580
  3. Rich Grise

    Rich Grise Guest

    The NiMH should work in the handset, but disable the base-unit charger or
    replace it with a smart NiMH charger, or get two sets and swap them out
    into a stand-alone charger. And still disable or rip out the base-unit

    I wouldn't try to charge a 1300mAH NiMH with a 600mAH NiCD charger.

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