Geekzone: technology news, blogs, forums
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.

434 posts

Ultimate Geek
Inactive user

# 120881 17-Jun-2013 08:05
Send private message

I have a undien cordless phone with a 3.6v 500mah ni-cad
I cant find the model number (bt-905s)on the dse or jaycar websites
Is it safe to use a 3.6vni-cad phone battery with a different mah rating e.g 800 or 1000mah

also I see they are allot cheaper on trademe? e.g $5 as opposed to $30 should those ones be avoided?

Also should i stick to ni-cad or could i use ni-mh?

Create new topic
2979 posts

Uber Geek

  # 837924 17-Jun-2013 09:06
Send private message

Pretty hard to find the 'exact' replacement battery without paying more than a new phone isnt it?

I looked into this a while ago for a phone with a dodgy battery - someone can(and will) correct me if I am wrong, BUT, dont swap battery types - from memory the Ni-mh and ni-cads have different charging requirements and you could cook the battery if you change types.

You should be ok putting a larger capacity battery in the phone though - Might take a little longer to charge initially - but then they just get small top ups from then. Also - you would have longer talking time.

Nothing is impossible for the man who doesn't have to do it himself - A. H. Weiler

1848 posts

Uber Geek


  # 837941 17-Jun-2013 09:39
Send private message

Pop into DSE or Harvey Norman, they usually have a range of these batteries.
If all else fails, Uniden NZ website sell batteries.

As someone else mentioned, battery price vs new phone...
Im sure you could find a non branded option on trademe


434 posts

Ultimate Geek
Inactive user

  # 837951 17-Jun-2013 10:02
Send private message

am aware that new phones are not much more expensive but my phone has an inbuilt answering machine which means new battery is definitely the cheaper option

3344 posts

Uber Geek


  # 837953 17-Jun-2013 10:04
Send private message

I got some from for a few bucks to replace the batteries in my old uniden, I needed 2 sets and ordered 3 which was good as one didn't work (I never investigated).  These are likely the same ones you would order from Trademe.

Just watch out for the dimensions, the capacity stated will be different in most cases from your factory battery (and fairly meaningless in terms of actual capacity).

It should be OK to swap them out for NiMH if you can find a pack the right size, you will get more capacity and the charging requirements are very similar.  I have seen people say you're not supposed to trickle charge NiMH but in reality a low current trickle doesn't seem to do them any harm, and if you actually use your phone regularly it's unlikely that they will be sitting in a full charged state very much.

434 posts

Ultimate Geek
Inactive user

# 839165 19-Jun-2013 11:28
Send private message

Cr*p I took the case of the phone off to grind a bit of plastic out so the battery would fit. Decided to plug in the battery with the case off. Apparently the plug fits just fine in the reverse polarity position. I don't think the smoke is going back in. 

408 posts

Ultimate Geek

  # 839182 19-Jun-2013 11:43
Send private message

There are a ton on ebay,
I've bought battery packs myself from ebay before for a uniden phone and never had any problems with them really.

3344 posts

Uber Geek


  # 839203 19-Jun-2013 11:50
Send private message

qwerty7: Cr*p I took the case of the phone off to grind a bit of plastic out so the battery would fit. Decided to plug in the battery with the case off. Apparently the plug fits just fine in the reverse polarity position. I don't think the smoke is going back in. 

Oh yeah, uhh, watch the polarity...


434 posts

Ultimate Geek
Inactive user

  # 839215 19-Jun-2013 11:58
Send private message

The case clearly labeled what side was red and black but I had it off. The plug had bumps in to the plug could only fit one way, it thought I had it right, apparently not, turns out it fits both ways. Stupid. 

Create new topic

Switch your broadband provider now - compare prices

Twitter and LinkedIn »

Follow us to receive Twitter updates when new discussions are posted in our forums:

Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:

Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:

News »

Logitech introduces new Made for Google keyboard and mouse devices
Posted 16-Oct-2019 13:36

MATTR launches to accelerate decentralised identity
Posted 16-Oct-2019 10:28

Vodafone X-Squad powers up for customers
Posted 16-Oct-2019 08:15

D Link ANZ launches EXO Smart Mesh Wi Fi Routers with McAfee protection
Posted 15-Oct-2019 11:31

Major Japanese retailer partners with smart New Zealand technology IMAGR
Posted 14-Oct-2019 10:29

Ola pioneers one-time passcode feature to fight rideshare fraud
Posted 14-Oct-2019 10:24

Spark Sport new home of NZC matches from 2020
Posted 10-Oct-2019 09:59

Meet Nola, Noel Leeming's new digital employee
Posted 4-Oct-2019 08:07

Registrations for Sprout Accelerator open for 2020 season
Posted 4-Oct-2019 08:02

Teletrac Navman welcomes AI tech leader Jens Meggers as new President
Posted 4-Oct-2019 07:41

Vodafone makes voice of 4G (VoLTE) official
Posted 4-Oct-2019 07:36

2degrees Reaches Milestone of 100,000 Broadband Customers
Posted 1-Oct-2019 09:17

Nokia 1 Plus available in New Zealand from 2nd October
Posted 30-Sep-2019 17:46

Ola integrates Apple Pay as payment method in New Zealand
Posted 25-Sep-2019 09:51

Facebook Portal to land in New Zealand
Posted 19-Sep-2019 18:35

Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.