[chbot] Battery spot welder

Hartley, Robin (Nokia - NZ/Wellington) robin.hartley at nokia.com
Wed Jun 2 23:57:37 BST 2021

Hi Wallace,

I purchased a SUNKKO 737G+ spot welder from Guang hua wei tech. CO.,LTD Store On Ali Express end of 2019 and it works well.

I got the optional spotwelding pen that allows me to weld into the centre of large battery banks.

Only issue is that it has quite high inrush current & so trips the mains circuit breaker ( a C16 MCB) occasionally 

Current list is 


-----Original Message-----
From: Chchrobotics <chchrobotics-bounces at lists.ourshack.com> On Behalf Of Marshland Engineering
Sent: Thursday, June 3, 2021 9:31 AM
To: chchrobotics at lists.ourshack.com
Subject: Re: [chbot] Battery spot welder

Hi Helmut.

Great write up. Recycling is great but my most precious item is time. The reason to recycle the batteries is that they can provide power to various projects I have that currently do not have an off the self answer. So, my reasoning is that if I'm going to get these other projects done, I need a proved working solution and I am prepared to pay for it.

I am surprised that I did not get more responses from the group. I would have thought most are using batteries for some sort of project or another. 

Cheers Wallace

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