Super Capacitor 120v Battery Spot Welder

We believe this is the best value spot welder for DIY battery building. An electrical engineer designs, assembles, and programs this super capacitor based 120v powered spot welder. Power supply is included. No battery power supply required. No assembly required. No programming required. This is plug and play. Spot welds up to 0.3mm thick nickel.

Only 1 person is making these. He can only make a certain amount each month. If these are sold out we will list more the next month. Not only are you getting an amazing deal on a quality spot welder, you are also supporting an electrical engineer with many years of spot weld design and assembly experience.

You can make your own stand for this. An enclosure would have added extra cost so we decided to not add an enclosure. The last photo shows an idea for a stand.

Step 1. Plug the spot welder into a standard 120v outlet.

Step 2. Wait for voltage display to reach 5.3v. When you initially power up the spot welder it will take about 15 minutes to fully charge the capacitors. After the initial charge the power supply will normally keep up with your spot welding speed.

Step 3. Adjust the power setting from 005-080.

Step 4. Spot weld batteries

When spot welding a new nickel strip it is important to start on the low power setting, test with a used battery, then adjust to a higher setting until you find the perfect amount of power for your nickel. You will know the power is right when the nickel tears off without making a hole in the battery. Start at power level 005, test the spot weld, then pull off the nickel. If the nickel pulls off easy, increase to 010 power level. Try again. Once you get your correct setting you will be ready to go. Pure nickel and and plated nickel require different settings. Below is a chart of estimated power settings for each thickness of nickel material. This can also spot weld copper strip.

0.1mm = 005
0.12mm = 006-010
0.15mm = 015-020
0.2mm = 040
0.3mm = 080

When not using the spot welder the pens should never touch. Cover the tips when not in use. You should use something as a mount/stand so it doesn't fall over during use. When handling use gloves and keep anything metal away from the spot welder. If you ever have to replace the probes make sure the capacitors are discharged first. This has 2 large capacitors in series. Always wear glasses when spot welding. Keep out of reach of children. Don't eat the spot welder.

Display info: Fully charged the voltage display will show 5.3v. That is the number on the left side. The right side number shows the power level (005-080). The middle number is the spot weld time delay. When you have both probes placed on the nickel this will determine the time (in seconds) until the spot weld occurs. You can change both the time delay (0.5-4 seconds) and power level (005-080) by pressing the dial. You will see the > indicator next to the setting you are adjusting. To adjust simply turn the knob. The black button is just for turning the spot welder on and off.

Time delay: 1=0.5 seconds. 2=1second. 3=1.5 seconds..... 9=4.5 seconds. The formula is simple. You can only adjust the time delay from 1 to 9. Each 1 equals 1/2 second. You should probably give yourself at least 2 seconds of delay (setting 4) until you get good at it. This allows you time to adjust and make sure you have good pressure.

Best practice would be to place one tip onto the nickel, then place the other tip about 3/16" next to it. Press firmly but not too hard. Within 1 second the spot welder will spot weld. No foot pedal needed. You may need to practice a little if this is your first time. We spot welded an entire ebike battery at a normal pace on power level 020 and we did not have to pause for recharge. We also have replacement copper tips and copper tip files available at an affordable price. The copper tips are easy to replace and you want to make sure they are clean when you use them. A great feature with this spot welder is the tips are replaceable so you don't have to replace the whole wire when the tips need replaced.

Dimensions 7" x 5" x 2.5"

Cable probe length is around 20".

Power supply (included) is 12v 5a 60w. The spot welder converts 12v to 5.3v to fully charge the capacitors.

This will get the job done at an affordable price and will last a long time. It's a great DIY tool to own for many different projects.