Question about Uniden TRU8885 Digital Answering Machine

3 Answers

Uniden Power Max 5 Battery problem

My Power Max 5 phones have a short battery life.  I replaced all batteries on 6/28/08 and every one of the phones in the set go to "low battery" after 10 minutes of use.  I cleaned the contact on both the phones and charger stands and still get this indication.

Posted by on

  • 4 more comments 
  • Anonymous Nov 07, 2008

    I have the same problem I have 5 uniden powermax telephones and after 10 minutes of usage the battery is dead and has to be sat back on the recharger.

  • Anonymous Jan 03, 2009

    I got replacement batteries for my two phones, and they both die after 30-60 minutes. should I replace the batteries or the phones?

  • Anonymous Jan 16, 2009

    i have the same problem .... lasts only 10-15 minutes.....

  • lasjflajsdlf Jan 30, 2009

    It's really odd. I have 2 Uniden phones at home.

    The Tru9485 has no battery problems. The CLX-485 has the same you guys are mentioning with short battery life.

    I wonder if Uniden discovers a problem, fixes the problem, and just releases a new version.

  • Anonymous Feb 18, 2009

    Same problem.

  • Anonymous Mar 15, 2009

    o man i wish i knew about this before i ordered them like 5 minutes ago, i have the Uniden powermax 5.8 ghz with the same batteries and the old ones last for about 45 minutes (ive had the phone for 6 years now) im guessing the new ones should do the job!


3 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 3 Answers

Your phones have the charger built into them and that is what has gone bad. After a while the dealt-V sensing unit dies and the phone overcharges the battery. You will notice your batteries heat up when charged then your delta-V sensing circuit is probably shot.

Personal Note: I think home phone manufacturers are using old non-lipo technology because it has these faults and you will have to get a new phone after some time. Also.... Why aren't home phones half as cool as cell phones??? Hmmmm.... Yeah I want my home phone to get, wifi, contact sync, usb connection, color screen, multi-ring, infinate contact storage, calendar, timer, and all the other bs in a cell phone. At least contact sync through USB, come on. Or even a shared phonebook for all phones right.

Posted on Oct 07, 2010


  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 3 Answers

Everyone here is missing the point. Yes, batteries become tired and need to be replaced, there are some bad replacement batteries out there, and even charging circuits can fail. However, 95% of technology failures are in oxidized connections, and this is not different. The real problem with the TRU8885 is that the gold plating on the charging base's wire contacts becomes worn off, the ferrous core material oxidizes easily, and the base stops delivering a charge. The charge indicator light will still see a connection and illuminate, but it's not a solid enough connection for the kind of current needed for a charge. The problem is on the base because the round wire provides very little contact area, wearing it down quickly. The flat contacts on the phone have a very large (and slightly shifting) contact area, and fare much better.

I'm looking into retrofitting another wire into the base, because otherwise these phones are pretty good. Check back later...

Posted on Dec 21, 2011

  • gmvalentine May 02, 2013

    After I leave it on the charging base for a few hours, the battery indicator on the handset will indicate a fully charged battery, but as soon as I pick up the phone and have a minute conversation, the battery will die, and the battery indicator indicates no charge.

  • Mark May 02, 2013

    This is most likely because of eroded gold plating on the base spring contacts, as I described above. I finally got rid of these phones. It's just too hard to replace the wires.


  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

I have the Powermax 5.8Ghz phone, (base model:TRU8885-2). The original batteries were great, If kept up on with a fresh charge the phone would last up to 2hours. We went for a cheap option when buying replacement batteries and after a year of service the phone dies within 20-30 minutes of use. I would recommend buying a quality replacement, otherwise you will keep wasting your money time and time again... not to mention the frustration of chasing down the other handset before your call gets dropped.

Posted on Jun 28, 2010

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

The battery dying in no time very short life

Geert, replace the battery. You can find them at walmart, the source,small electronic shops or just Google search your make and model# replacement battery.
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

Jun 24, 2016 | Vtech Accessory Handset with Caller ID for...

2 Answers

Battery go's died almost instanly. on by prower max 5.8 ghz

Welcome to Fixya

Looks like you need to replace the battery. Try to replace the battery first then observe the issue again.

Thank you for using Fixya!

Aug 04, 2011 | Uniden Cordless Phone

1 Answer

Battery life is very short. is there a replacement battery available and if so how where can i buy one and how much is it?

One source for about 15USD is at

May 28, 2011 | Uniden DXA15588-2 Twin Cordless Phone

1 Answer

Short battery life

The manufacturer recomends replacing the batteries every year. I have several phones that have had the same batteries for 2 or more years, but the time they hold a charge starts to drop after a year or so.

Jan 22, 2010 | Uniden 2.4GHz Digital Answering System...

1 Answer

Short battery life

Battery life on laptops is like the mileage estimates on new car's wishful thinking. You would have to set the power management to shut the screen off after 5 minutes of inactivity, shut the drives off after 6 minutes and send the thing into hibernation after 10 minutes to get better batttery life.

Sep 06, 2009 | Samsung NC10-14G Notebook

1 Answer

Battery life

I have the same problem. Replacing the battery solves it, but for about 6 months, then the new battery holds less and less charge.

Apr 20, 2009 | Uniden TRU8866 Cordless Phone

1 Answer

Battery died and or charging system failure

I think its probably your only choice, NIMH batteries are known to have a very short shelf life if not regular charged / discharged you can get GE cordless batteries here - GE Cordless battery

Jan 10, 2009 | Uniden Cordless Phone

1 Answer


replace the batteries.

Jun 03, 2008 | Uniden Cordless Phone

1 Answer

Short battery life

Try running the battery down completely (0% so it turns off itself), and charging whilst the phone is completely off (I'd suggest leaving it overnight). Repeat this once or twice, then see if your battery life has improved. Also ensure that you havent left anything on that could be eating your battery up i.e. bluetooth, and contact your supplier if the problem persists, as you should be covered.

Aug 28, 2007 | Samsung SCH-u540 Cellular Phone

Not finding what you are looking for?
Uniden TRU8885 Digital Answering Machine Logo

4,932 people viewed this question

Ask a Question

Usually answered in minutes!

Top Uniden Lands Phones Experts


Level 3 Expert

102366 Answers


Level 3 Expert

7993 Answers

Cindy Wells

Level 3 Expert

4948 Answers

Are you an Uniden Lands Phone Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides