Comments on: Rebuilding Battery Pack Of Schiller Ventilator Model GRAPHNET TS

By: Parasuraman S

Parasuraman S — Thu, 05 Mar 2026 00:31:46 +0000

Ha! Ha! Good pun and fun! Yes, we need to have a minimum investment required. But I think no one can match the class tools and facilities our Jestine Yong is providing to his students! Lucky are those who get a chance to study there! Many thanks, dear Yogesh Bai!

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By: Yogesh Panchal

Yogesh Panchal — Wed, 04 Mar 2026 08:12:15 +0000

Good Job! Sir
It's good to see that "Ventilator" has come out of the ventilator.
If you want to stay in this industry, then investment is must in good tools.

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By: Parasuraman S

Parasuraman S — Sun, 01 Mar 2026 15:45:46 +0000

In reply to Mark.

Many thanks! I think I have to claim some commission for the sales boosting from this supplier! HA! HA!

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By: Parasuraman S

Parasuraman S — Sun, 01 Mar 2026 15:43:58 +0000

In reply to Albert van Bemmelen.

Many thanks for the clarification!

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By: Mark

Mark — Sun, 01 Mar 2026 11:58:22 +0000

Good repair with spot welder. I have just ordered mine for a project. Videos I have watched all indicate that most of the welders work as specified.

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By: Albert van Bemmelen

Albert van Bemmelen — Sun, 01 Mar 2026 09:44:03 +0000

In reply to Parasuraman S.

Just for confirmation... My first, second and if I'm not mistaken also my thirth welder, all had foot switches, but that didn't make them any better.
Thanks for sharing your good experiences with the on Amazon bought spotwelder dear Parasuraman! Glad that Amazon is also available in your big country.

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By: Parasuraman S

Parasuraman S — Sun, 01 Mar 2026 00:35:51 +0000

In reply to Mark J.

Battery spot welding is an interesting work and I enjoy it! Many thanks for your comments, dear Mark!

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By: Mark J

Mark J — Sat, 28 Feb 2026 20:11:49 +0000

I have never used a battery spot welding machine before. I will have to look into getting one. Good job on the repair. Thank you for sharing.

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By: Parasuraman S

Parasuraman S — Sat, 28 Feb 2026 15:19:24 +0000

In reply to Albert van Bemmelen.

Sad to hear your repeated failures in getting a useful spot welder. This one has been used by me several times and is found to be reliable and handy, especially with the foot switch. The probes should be as close as possible to make a proper and powerful arcing. Many thanks for your expert comments and sharing your experiences, dear Albert!

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By: Albert van Bemmelen

Albert van Bemmelen — Sat, 28 Feb 2026 11:41:53 +0000

Happy to see that you had great success with the new bought spotwelder.
I say this because I had limited success with several new bought spotwelders that practically failed to make decent welded spots.
My first spotwelder from China used way too much AC power that easily could blow my main power fuse and therefore was completely useless in a home with only a 25A main powerfuse. And the 709A spotwelder probably used much more power than the max allowed 3680 Watts. Just the in-rush current alone was already blowing my 16A group fuse.

So therefore I then bought a 2.1KG Super capacitor 12V/3A digital spotwelder which supposedly could weld 0.25mm upto 0.3mm nickel strips, and even 0.1mm copper strips. But completely failed doingh what it promised and also was wasted money!

So my third spotwelder was a lithium operated Dh20 4.2V 650A max current welder that supposedly could weld 0.1 to 0.15mm nickel strips. And was designed for a current upto 1200A but also was a bad working welder. Although it still was useful for 5V backup battery because of its USB output connector.

After that a fourth and my last bought welder was an AWithZ model H1 input chargable Type-C 5V/1A completely handheld portable spot welder that outputs 4.2V at max 650A.
All these above mentioned welders are still disappointing to be honest. I hardly could weld spots that held after trying to pull loose the strips.
And if I would be sure your shown spot welder really outputs upto 1200A making sturdy spotted welds I would even consider buying a fifth welder. But I have not much confidence left in those welders that fail to do what they promise.

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