Question about Uniden 5.8GHz Dual Cordless Phone

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UNIDEN Powermax5.8 cordless phone charging

I have approx. a two year old Uniden Powermax5.8 cordless phone with 2 phones and bases. Most recently both of the cordless phones are not holding charges for more that maybe 20-25 minutes. I'm going out tomorrow to buy 1 replacement battery. I'm an electrician and familiar with multimeters. My question is: I would like to use my meter to check the charging capacity of the phone base. What setting should I use on meter (ACV or DCV) and what output range should the base be putting out?

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  • Anonymous Sep 24, 2008

    I have the same problem


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Mine came with Nickel-Metal Hydrides. You can find them on the web.

Posted on Nov 08, 2008

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Have the same problem. seems the handset is too warm, showing too fast a charge rate for the battery ( methinks ) even with a replacement battery. havent checked current, charge voltage yet, but this is a GREAT phone, as phones worth figuring out.
any chance it came originally with lithium batteries, rather than nkms?

Posted on Sep 01, 2008

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Posted on Jul 30, 2008

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1 Answer

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Sounds like the radio in your base phone has quit working. Yes, you can buy another base but it has to be the same model s your existing one. After you get the new base follow the instruction in your users manual to unregister the old handset and then reregister them to the new base. Link to users manual

Jan 29, 2014 | Uniden Cordless Phone

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Here are a few options; 1) your picture shows two bases, if that is the case, is it happening to both bases/phones, if not check terminals to make sure both are clean and connecting well. 2) if possibly exchange them, Uniden's are usually good phones, I've owned them before. 3) If you have one phone holding a charge and the other not, exchange the batteries and see if it's specific to the battery set. If so, you can purchase replacements at several stores. Hope that helps.

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How do i recharge my uniden phone battery

Phone's "Status Light" Not Illuminating or Battery Failing to Charge

  • 1.Check that the base unit's AC adapter is plugged into the both the base unit and electrical outlet firmly.

  • 2.Wipe the base unit's handset holder's connectors and the connectors on the bottom of the handset with a soft cloth/rag or pencil eraser to remove any loose dust and dirt from the metal connectors.

  • 3.Place the handset firmly in the base unit holder until the "Status Light" illuminates, indicating the battery is charging.
    4.Replace your Uniden cordless phone's battery, by purchasing a compatible battery from an electronic supply store or directly from Uniden. Turn your phone's handset unit over and remove its battery door. Lift the phone's battery pack up and gently unplug the battery's wire connector by pressing in on the connector's side and pulling the connector free from the phone's circuit board. Battery installation is the reverse of removal.

    Read more: Troubleshooting a Uniden Cordless Phone '

    Sep 02, 2011 | Uniden Cordless Phone

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    Phones are approx. 5yrs old.....starting to get cracking noise?

    Sounds like the batteries may not be holding a full charge and depleting rapidly. Batteries are usually only good for a few years at best. Given the age of your phones and the much better quality of today's units (DECT 6.0) it is probably a wiser choice to replace the phones than just the batteries. At 5 years old the old phones have served you well and you'll probably enjoy the benefits of newer technology. There are many good brands to choose from - my personal preferences are Uniden and Panasonic.

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    Here's the Uniden manual for DXA15188-2 =>

    Here's the link to all Uniden Cordless Phones =>

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    I always tell people NOT to buy new batteries to try and fix their cordless phone. It seems to rarely solve the problem and you are usually better off just spending the money on a new phone. Unfortunately 5 years is a long time for cordless phones these days. There are so many brands, and so many thousands of models, it's impossible to keep track of them all.

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