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




438 posts

Ultimate Geek
+1 received by user: 9


# 176991 18-Jul-2015 10:51
Send private message

I have 7 smoke alarms and when the alarm begins to beep I usually wait the for weekend and then attempt to find out which one is dying. This time I was too late.
Fortunately I borrowed a multimeter from a work colleague and found the dead battery. His multimeter is an old Disk Smith one which requires a battery to power it. I have read that these should be avoided if possible.

I am now thinking that I need a device to test any sort of battery. I can only imagine myself using it for testing batteries and I figure it should last for a long time (or at least until AA, AAA batteries are obsolete).


Can anyone recommend a battery tester. I have seen cheap ones for $5 and multimeters start at say $30-$40.





PC: HP ProBook 470G1 (Windows 10 Pro), Intel NUC7I5BNH (Windows 10 Home), Macbook Air (Mid 2013)
Net: Draytek Vigor 130 Modem (VDSL) in bridge mode to Ubiquiti Edgerouter Lite-3, 3 x Grandstream GWN7610 (Mesh)
Storage: Synology DS216play NAS, 2 x 6TB
Media: HDHomeRun Connect, 5 x Amazon FireTV, TiVo, Echo, Dot, Spot, Broadlink RM Pro+, Ambi Climate
TV: 2 x Samsung H6400 55" LED TV, Panasonic TH-P50G10Z 50" Plasma TV (Great picture, no smarts, just old), DMR-PWT530GZ Blu-ray Recorder (Rubbish!)
Mobile: Samsung Galaxy Note 5, Huawei P10 Lite
Wearable: Gear S3 Frontier


Filter this topic showing only the reply marked as answer Create new topic
8650 posts

Uber Geek
+1 received by user: 2975

Lifetime subscriber

  # 1346655 18-Jul-2015 11:03
Send private message

any decent multimeter has a battery in it.

my advice to you is change the battery when it first starts to beep :)

1678 posts

Uber Geek
+1 received by user: 402

Trusted
Lifetime subscriber

  # 1346656 18-Jul-2015 11:09
Send private message

Think about it, if it's an analogue meter (with a needle) no battery is actually required to read voltage, although to do an ohms reading the battery would be required

No a digital meter.....battery is required to do any tests.....

 
 
 
 


5050 posts

Uber Geek
+1 received by user: 3774

Trusted
Lifetime subscriber

  # 1346727 18-Jul-2015 14:14
Send private message

alisam: I have 7 smoke alarms and when the alarm begins to beep I usually wait the for weekend and then attempt to find out which one is dying. ...


If one of them starts to bleep replace ALL of the batteries immediately - you should be doing this at least once a year anyway.

Battery testing is almost irrelevant  - if one battery has died, they will all die soon.




Sideface




438 posts

Ultimate Geek
+1 received by user: 9


  # 1346734 18-Jul-2015 14:31
Send private message

I don't need to change all the batteries at once, because they are not all of the same age.

My post is for a recommendation for a device to test batteries.






PC: HP ProBook 470G1 (Windows 10 Pro), Intel NUC7I5BNH (Windows 10 Home), Macbook Air (Mid 2013)
Net: Draytek Vigor 130 Modem (VDSL) in bridge mode to Ubiquiti Edgerouter Lite-3, 3 x Grandstream GWN7610 (Mesh)
Storage: Synology DS216play NAS, 2 x 6TB
Media: HDHomeRun Connect, 5 x Amazon FireTV, TiVo, Echo, Dot, Spot, Broadlink RM Pro+, Ambi Climate
TV: 2 x Samsung H6400 55" LED TV, Panasonic TH-P50G10Z 50" Plasma TV (Great picture, no smarts, just old), DMR-PWT530GZ Blu-ray Recorder (Rubbish!)
Mobile: Samsung Galaxy Note 5, Huawei P10 Lite
Wearable: Gear S3 Frontier


8650 posts

Uber Geek
+1 received by user: 2975

Lifetime subscriber

  # 1346792 18-Jul-2015 15:24
Send private message

your method is very illogical

but here:
http://www.jaycar.co.nz/Test-%26-Measurement/Multimeters/Digital/Cat-III-Multimeter-with-Temperature/p/QM1323
http://www.jaycar.co.nz/Test-%26-Measurement/Multimeters/Digital/Low-Cost-Digital-Multimeter-%28DMM%29/p/QM1500

ive made one of the bottom ones before and seemed to work ok, the top one is what some students at uni use and seems to be ok

1678 posts

Uber Geek
+1 received by user: 402

Trusted
Lifetime subscriber

  # 1346823 18-Jul-2015 15:57
Send private message

the charged and flat voltages will also vary with battery chemistry, it is certainly an awful lot of effort to figure out when a battery may be flat

8650 posts

Uber Geek
+1 received by user: 2975

Lifetime subscriber

  # 1346877 18-Jul-2015 17:17
Send private message

gregmcc: the charged and flat voltages will also vary with battery chemistry, it is certainly an awful lot of effort to figure out when a battery may be flat


yep especially when you can get them for less than $1 each on TM, once a year go and spend $7 on batteries and change them all at once

you are potentially playing with peoples lives over a few $$

do it the logical and recommended way

 
 
 
 


Fat bottom Trump
10151 posts

Uber Geek
+1 received by user: 4989

Lifetime subscriber

  # 1346890 18-Jul-2015 17:40
2 people support this post
Send private message

I don't know how reliable battery testers are, especially cheap ones. I prefer to use an analogue multi-meter because digital meters are too sensitive and may show a battery at full voltage when it is actually dead. Analogue meters load the battery a little, giving a more reliable reading. Even better is to put a proper resistive load across the battery and then measure it. If there is no voltage dip you know the battery is good.





I reject your reality and substitute my own. - Adam Savage
 


3267 posts

Uber Geek
+1 received by user: 77

Trusted

  # 1347328 19-Jul-2015 20:06
One person supports this post
Send private message

Analogue and digital meters are both good.  It is only when the battery of a cheap digital meter gets low then the reading goes all over the place (found with the $12 one from Jaycar linked above).

Smoke alarms can run with a very low battery voltage, there is a fair grace period between starting to beep and stopping to beep.  However, that only applies when you use alkaline batteries.  But you should anyway never ever use "heavy duty" or "super" batteries for anything, which are carbon zinc and functions by corrosion and eventually corrodes the canister causing acid leaks.  Alkaline have a 7 year shelf life, carbon zinc has about 6 months.




You can never have enough Volvos!


1782 posts

Uber Geek
+1 received by user: 435


  # 1347504 20-Jul-2015 09:56
Send private message

Rikkitic: Analogue meters load the battery a little, giving a more reliable reading. Even better is to put a proper resistive load across the battery and then measure it. If there is no voltage dip you know the battery is good.



Analogue meters actually put b8gger all load on it ,so little load its irrelevant here, look at the meter specs .(ohms per volt).
:-)
Good point about putting a real load on it, though its easier to just replace batts regardless .


14 posts

Geek
+1 received by user: 5


  # 1347763 20-Jul-2015 13:33
Send private message

I just have a few cheap torchlights in the cupboard which use single batteries of different sizes. I pop in the battery and check how bright it lights up.

Filter this topic showing only the reply marked as answer Create new topic



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 »

Scientists unveil image of quantum entanglement
Posted 13-Jul-2019 06:00


Hackers to be challenged at University of Waikato
Posted 12-Jul-2019 21:34


OPPO Reno Z now available in New Zealand
Posted 12-Jul-2019 21:28


Sony introduces WF-1000XM3 wireless headphones with noise cancellation
Posted 8-Jul-2019 16:56


Xero announces new smarter tools, push into the North American market
Posted 19-Jun-2019 17:20


New report by Unisys shows New Zealanders want action by social platform companies and police to monitor social media sites
Posted 19-Jun-2019 17:09


ASB adds Google Pay option to contactless payments
Posted 19-Jun-2019 17:05


New Zealand PC Market declines on the back of high channel inventory, IDC reports
Posted 18-Jun-2019 17:35


Air New Zealand uses drones to inspect aircraft
Posted 17-Jun-2019 15:39


TCL Electronics launches its first-ever 8K TV
Posted 17-Jun-2019 15:18


E-scooter share scheme launches in Wellington
Posted 17-Jun-2019 12:34


Anyone can broadcast with Kordia Pop Up TV
Posted 13-Jun-2019 10:51


Volvo and Uber present production vehicle ready for self-driving
Posted 13-Jun-2019 10:47


100,000 customers connected to fibre broadband network through Enable
Posted 13-Jun-2019 10:35


5G uptake even faster than expected
Posted 12-Jun-2019 10:01



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.