Does the second welding battery need to be removed from the power supply

Magi-Circuit Digital Systems delivers smart energy systems, integrated management, digital platforms, and optimization scheduling for European industries.

Industry
Apr 26, 2026

[Mature Content] r/Welding on Reddit: I bought a 50

41 votes, 103 comments. 436K subscribers in the Welding community. Reddit inc. is selling your content to AI farms. Please ensure that anything you Skip to main content. Open menu Open navigation Go to Reddit Home. r/Welding A

Industry
Nov 05, 2025

What does I-CAR say about disconnecting the battery prior to

Disabling the restraint systems is commonly done by disconnecting and isolating the negative battery cable. Time must also be allowed to pass for the system to completely discharge.

Industry
Jun 12, 2026

Batteries need strong connections are resistance, laser and micro

Fig. 6. Application examples of basic configurations to weld tab to a battery pole as described in Figure 5. Fig. 7. Examples of battery packs welded with resistance welding technology. a) typical pack used in e-bikes, b) battery pack used in power tools, c) battery pack used in small size portable devices, d) battery with integrated connector.

Industry
Jan 13, 2026

disconnect batteries?

Electrical components are at risk NOT from the normal voltage and current given out by a welder during use, but instead from the very large voltage spike that occurs unavoidably when the arc is switched OFF.

Industry
Feb 18, 2026

Should I disconnect the battery?

I like to disconnect the ecu for welding. Battery likely wont care and neither would many of the sensors, but Id say some could potentially be damaged by sharing a ground connection. Make sure the weld retun is as good as possible, not onto rust or paint.

Industry
Mar 11, 2026

Does Welding Affect Electronics? – Skilled Welder

If possible, remove sensors, modules, wires, and other electronic components from your welding area. You should remove them if they are within 300mm (12 inches) of the welding area. Although rare, you might set off the airbags if you are welding around a car, so disconnect the airbag fuse to be safe. Does Welding Affect Electronics?

Industry
Jul 11, 2025

Disconnecting Car Battery for MIG Welding: Is It Necessary?

I''m wondering if it''s necessary to disconnect the car battery when using a MIG welder. I''ve heard mixed opinions and would like to know the best practices and any protective measures to avoid disconnection.

Industry
Sep 05, 2025

How To Change Battery In Lincoln Electric Welding Helmet: Quick

Don''t worry; this task is straightforward and won''t take much time. First, turn off the helmet''s power and remove the lenses to gain easy access to the battery compartment. Next, press the battery release tab to remove the battery carefully. Take note of the battery''s polarity and insert the new battery in the same position. Finally

Industry
Sep 23, 2025

How To Change Battery In Hobart Welding Helmet: A Step-by

Then, use a screwdriver to remove the battery cover, which is commonly located on the back of the helmet. Once you have access to the battery, simply pull it out and replace it with a new one. Make sure that you insert the new battery in the same orientation as the old one. After that, reattach the battery cover, snap the clear lens covers back into place, and you''re done! With a

Industry
Jul 22, 2025

Can Welding on a Car Cause Damage? 5 Tips

How to Protect the ECU While Welding on Your Car. The ECU needs battery power or voltage to run correctly. However, the ECU is only designed for a smaller amount of energy that the car battery can deliver. When you weld, you

Industry
Feb 12, 2026

The disconnect the bettery before welding myth.

Edit: you shouldn''t NEED to disconnect the battery, BUT like you said - only takes a minute. Takes me longer to set the welder up than it does to take battery cables

Industry
Nov 11, 2025

Any point in disconnecting the battery when welding on a vehicle?

Disconnecting the battery when welding on a vehicle is a recommended safety precaution. This is because welding creates a lot of electrical current and voltage, which can

Industry
Jul 31, 2025

Welding On A Hybrid Or Electric Vehicle

When welding on a hybrid vehicle or electric vehicle (EV), follow the same precautions with the 12-volt system as when welding on a conventional vehicle. In addition, there are precautions to take with the high-voltage battery. Remember to disconnect both the 12-volt battery and the high-voltage battery service disconnect. (Note: Always disable the high-voltage

Industry
Jun 28, 2026

grounding the workpiece you''re welding

The welding machines frame is grounded via the equipment ground of the power supply... it has no connection to the work piece or metal work table through either the ''work lead'' or ''electrode lead''.. ANSI Z49.1, "Safety in Welding, Cutting and Allied Processes," the workpiece or the metal table that the workpiece rests upon must be grounded.

Industry
Jun 02, 2026

Electric welding on modern car, what to disconnect?

Typically ahead of welding (MIG or ARC) I would disconnect the battery to prevent damaging any electrical systems on the vehicle. This particular vehicle has quite a large number of electrical systems including an alarm system which seems able to activate even when the battery is disconnected. Therefore, either specifically to the BMW E60 on generally on

Industry
Nov 26, 2025

Should I disconnect electronics during welding?

I told you to disconnect the battery before welding! Just kidding it was a fuel leak. It''s always smart to place your ground as close to the weld area as possible too help reduce the change

Industry
Jun 19, 2026

improve tab to terminal connections in Battery pack Manufacturing

electronic devices, cordless power tools, energy storage, and hybrid and electric vehicles. Tab to terminal connection welding is one of the key battery pack manufacturing applications. Manufacturers need equipment, systems, and automated lines that meet quality and production requirements for these products. Both resistance and laser products

Industry
Mar 12, 2026

Different Welding Power Sources

The power supply of a welding machine is a device that supplies the electrical energy required for the welding process. Generally speaking, the power supply of welding machines can be divided into the following types: Alternating Current Power (AC): One of the most common types, AC power draws its power from a regular household power source. AC

Industry
Aug 24, 2025

Disconnect battery when welding on car? Some say dont!

Some say to put a device on the battery (special device for welding) and leave the battery connected. Some say to disconnect the battery. The strange thing on this method is that I have read that computers can get damaged/fried through the ground which is always connected to the car, even without connecting the battery.

Industry
Dec 12, 2025

r/Welding on Reddit: Do I need to take any precautions when welding

On one side some say remove the negative battery, unplug all ECUs, BCMs, TCM, etc(all the cars computers, which is just somewhat unreasonable on most cars). Some say remove the negative and roll on. Some say leave the battery connected but disconnect computers And finally some say just ground close and weld.

Industry
May 10, 2026

r/Welding on Reddit: Can a TIG welder be used to spot

In this video on , by the DIY Perks channel, and in many other videos, he is making a rechargeable battery station for serious portable power.At 4:18, in the above video, he is discussing how it is not good to try to solder Lithium Ion

Industry
Sep 25, 2025

Arc Welding: The 5 Welding Processes You Need to Know

Basic Arc Welding Circuit Diagram. Arc Welding Terminology. If you''re new to welding, there are a few technical terms you need to know. Electrode – the material that transfers the arc to the base metal, and controls the weld. Arc – the arc of electricity between the base metal and electrode, which creates the heat required to weld. Gas shield – the shield of inert

Industry
Aug 25, 2025

Should you disconnect the battery before welding?

a semi truck ecm is about $1800.00, and it''s better to be on the safe side. i have seen ecms, alternators, batteries, radios and other electrical stuff burned up because the ground cables were not removed. maybe those were just flukes, but it does happen. it only takes 30 seconds to pull the ground cable....why mess around, just pull it.

Industry
Oct 02, 2025

Any point in disconnecting the battery when welding on a vehicle?

Disconnecting the battery when welding on a vehicle is a recommended safety precaution. This is because welding creates a lot of electrical current and voltage, which can cause electrical components in the vehicle to malfunction or become damaged. Disconnecting the battery helps to prevent this by isolating the electrical system of

Industry
Dec 03, 2025

What does I-CAR say about disconnecting the battery prior to welding

Disabling the restraint systems is commonly done by disconnecting and isolating the negative battery cable. Time must also be allowed to pass for the system to completely discharge. Refer to vehicle-specific service information for the proper procedure to disable the restraint system.

Industry
Apr 05, 2026

Electric welding on modern car, what to disconnect?

Typically ahead of welding (MIG or ARC) I would disconnect the battery to prevent damaging any electrical systems on the vehicle. This particular vehicle has quite a

Industry
Feb 11, 2026

What precautions should be taken when welding on a tractor

Leaving the battery connected is actually better. The battery helps equalize any electronics in the event of a voltage spike. That being said, if you ground very close to where you are welding, you won''t have any issues. Problems arise if you are welding in a different area than your ground. For example, welding on the exhaust with your ground

Industry
Sep 26, 2025

Disconnect battery when welding on car? Some say dont!

Some say to put a device on the battery (special device for welding) and leave the battery connected. Some say to disconnect the battery. The strange thing on this method

Industry
Mar 08, 2026

How to Charge Welding Helmet: A Step-by-Step Guide for Safe

But what happens when your welding helmet runs out of battery power? You need to charge it, of course! The good news is that charging your welding helmet is a simple process. First, make sure your helmet is turned off and then locate the charging port on the side of your helmet. Plug the charger into the port and then plug the other end of the charger into a power outlet. Most

Industry
Apr 11, 2026

SMAW-Equipment and Setup 29107 Flashcards

Study with Quizlet and memorize flashcards containing terms like When hoisting heavy objects that tend to spin or swing, always use a? A. Pickup line B. Chain bridle C. Tag line D. Synthetic web sling, When viewing an alternating current (AC) sine wave, the top half of the cycle of the voltage path is considered? A. A variable voltage B. The positive half C. A constant-current D.

Industry
May 31, 2026

Battery welding

In batteries, it offers a good solution for welding busbars that would otherwise need a brazing material for resistance welding, or a high-power laser welder, according to Amada. Butt, fillet and lap welds in copper are routinely achieved

Industry
Apr 17, 2026

Unused Electrical Equipment Shall be Removed!

What do you think about this section that I would like to see added to the 2005 NEC, or how would you revise it? 110.3. Unused Electrical Equipment: Unused electrical equipment that is left abandoned in place, shall be permanently tagged and identified at all terminations and junction points, as being a potential electrical shock hazard. If required by the

Industry
Sep 11, 2025

Car battery disconnect or not?

When MIG welding on a car, do you have to disconnect the car battery? and if so, why? At least the negative -- essentially there are electronic components on any recent car that may object to strange welding voltages going through them. Some people will

Industry
Aug 28, 2025

Welding on cars

In terms of the effects on the car keeping the return clamp as close to the weld as you can with a really good, clean, connection means the welding current will take the easiest route back to the power source. Check for any panel joints, and eliminate them, in the current path which could divert the return current.

Industry
Jan 23, 2026

Should you disconnect the battery before welding?

a semi truck ecm is about $1800.00, and it''s better to be on the safe side. i have seen ecms, alternators, batteries, radios and other electrical stuff burned up because the

Industry
Jan 03, 2026

How To Replace Battery In Harbor Freight Welding Helmet

Step 2: Remove the Battery Cover. Now that you have gathered all the necessary tools, it''s time to remove the battery cover of your Harbor Freight welding helmet. This is the second step in replacing the battery and it''s crucial for accessing the battery compartment. To begin, inspect the helmet and locate the battery cover.

6 Frequently Asked Questions about “Does the second welding battery need to be removed from the power supply ”

Why should a car battery be disconnected after welding?

This is because welding creates a lot of electrical current and voltage, which can cause electrical components in the vehicle to malfunction or become damaged. Disconnecting the battery helps to prevent this by isolating the electrical system of the vehicle from the welding equipment.

Do you disconnect a battery before welding a truck?

Start them up & let them idle for 15 minutes.---MMW--- I always disconnect the ground terminal on the battery before I weld the truck, one time the fuse on the back up camera and radio burn due to overcurrent from welding. I disconnect 100% of the time on any vehicle.

Does disconnecting a battery hurt a welder?

In fact, disconnecting the battery -ve might cause more harm because it removes a common ground for all of the components. There is a common belief that you should have the welder return (earth) cable as close to what you're welding as practical - I'm not sure that the electrically this would make any difference, but it can't hurt.

Do welders unhook batteries?

They never unhooked batteries when welding on a truck or a machine. Never had battery or electrical problem from welding. Not until electronic controls became the norm. Link-Belt machinery in the mid 1990's had a sticker on a couple spots on the machine that warned to disconnect the electronics before doing any welding repairs on this machine.

Do you have a battery problem with a link-belt welding machine?

Never had battery or electrical problem from welding. Not until electronic controls became the norm. Link-Belt machinery in the mid 1990's had a sticker on a couple spots on the machine that warned to disconnect the electronics before doing any welding repairs on this machine. Or something like that, it's been a few years.

Why does a car battery burn when welding?

The burnt traces came from a row of heat sink mounted transistors along the side of the board. Disconnecting the battery when welding on a vehicle is a recommended safety precaution. This is because welding creates a lot of electrical current and voltage, which can cause electrical components in the vehicle to malfunction or become damaged.

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