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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
    safely?

    Thanks in advance!

    Mike
     
  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

    --
    Dan Hollands
    1120 S Creek Dr
    Webster NY 14580
    585-872-2606

    www.QuickScoreRace.com
     
  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
    charger.

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

    Sorry,
    Rich
     
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