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.




560 posts

Ultimate Geek


#270544 14-May-2020 11:11
Send private message quote this post

I have a dual 18650 diving torch battery pack which has pretty much died. The cost of replacement is US $150.

 

Does anyone have a spot welder, or can recommend a cheap spot welder from the likes of ebay or aliexpress?

 

Looking at building one from a 12v car battery if that is my only option.  

 

 


Create new topic
1202 posts

Uber Geek


  #2483625 14-May-2020 11:50
Send private message quote this post

If there is sufficient space, you might be able to solder the tabs. I rebuilt my drill battery with solder instead of spot welding.

 

I find that the nickle is a bit harder to solder that other metals, so make sure you sand it and use additional flux. Silver solder also works better than regular solder on nickle. A grunty iron also helps - my 20 watt was too weak, but with an 80 watt I could get in and out quickly so as not to overheat the batteries.




560 posts

Ultimate Geek


  #2483648 14-May-2020 12:12
Send private message quote this post

tripper1000:

 

If there is sufficient space, you might be able to solder the tabs. I rebuilt my drill battery with solder instead of spot welding.

 

I find that the nickle is a bit harder to solder that other metals, so make sure you sand it and use additional flux. Silver solder also works better than regular solder on nickle. A grunty iron also helps - my 20 watt was too weak, but with an 80 watt I could get in and out quickly so as not to overheat the batteries.

 

 

Thanks, but really not confident (for safety reasons) in soldering batteries, even if I discharge them to a low level, I'd prefer to spot weld, no real rush with this project so I'm ok to wait weeks for delivery via Aliexpress etc. Or hopefully I can make something from locally sourced parts. 


 
 
 
 


2136 posts

Uber Geek


  #2483650 14-May-2020 12:14
Send private message quote this post

Why not just buy 18650's with solder tabs pre-welded .
That seems the best/safest option (?)




560 posts

Ultimate Geek


  #2483653 14-May-2020 12:20
Send private message quote this post

1101:

 

Why not just buy 18650's with solder tabs pre-welded .
That seems the best/safest option (?)

 

 

Yeah that's a good option I didn't think about. I have a ton of 18650s at home so I'd still keen to get a spot welder.


123 posts

Master Geek

Trusted
Subscriber

  #2483895 14-May-2020 17:02
Send private message quote this post

I have a battery tab welder. Where are you?




560 posts

Ultimate Geek


  #2483942 14-May-2020 18:34
Send private message quote this post

bmoff:

 

I have a battery tab welder. Where are you?

 

 

 

 

@bmoff, I'm in Auckland. If you recommend your spot welder and it is not very expensive I might look at the same one. Regards.


123 posts

Master Geek

Trusted
Subscriber

  #2484502 15-May-2020 15:39
Send private message quote this post

I'm in Hamilton. My welder was home built a few years ago using various guides on the net. The controller is arduino based.

 

I see you can now buy controller boards relatively cheaply on Aliexpress, these might work with a battery powered unit and would make building one much simpler.


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 »

National Institute for Health Innovation develops treatment app for gambling
Posted 6-Jul-2020 16:25


Nokia 2.3 to be available in New Zealand
Posted 6-Jul-2020 12:30


Menulog change colours as parent company merges with Dutch food delivery service
Posted 2-Jul-2020 07:53


Techweek2020 goes digital to make it easier for Kiwis to connect and learn
Posted 2-Jul-2020 07:48


Catalyst Cloud launches new Solutions Hub to support their kiwi Partners and Customers
Posted 2-Jul-2020 07:44


Microsoft to help New Zealand job seekers acquire new digital skills needed for the COVID-19 economy
Posted 2-Jul-2020 07:41


Hewlett Packard Enterprise introduces new HPE GreenLake cloud services
Posted 24-Jun-2020 08:07


New cloud data protection services from Hewlett Packard Enterprise
Posted 24-Jun-2020 07:58


Hewlett Packard Enterprise unveils HPE Ezmeral, new software portfolio and brand
Posted 24-Jun-2020 07:10


Apple reveals new developer technologies to foster the next generation of apps
Posted 23-Jun-2020 15:30


Poly introduces solutions for Microsoft Teams Rooms
Posted 23-Jun-2020 15:14


Lenovo launches new ThinkPad P Series mobile workstations
Posted 23-Jun-2020 09:17


Lenovo brings Linux certification to ThinkPad and ThinkStation Workstation portfolio
Posted 23-Jun-2020 08:56


Apple introduces new features for iPhone iOS14 and iPadOS 14
Posted 23-Jun-2020 08:28


Apple announces Mac transition to Apple silicon
Posted 23-Jun-2020 08:18



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.