8000W Portable Battery Spot Welder with Foot Pedal

SeeSii 8000W Portable Spot Welder

The SeeSii 8000W Spot Welder joins nickel strips to cylindrical battery terminals. It delivers short, controlled current pulses that create strong welding points without prolonged heating.

The foot pedal allows hands-free activation. Meanwhile, the adjustable output helps you select a suitable welding level for different nickel-strip thicknesses.

Key Features

• Provides high-power pulse spot welding
• Supports approximately 0.1–0.3mm nickel strips
• Uses dual-pulse output
• Offers adjustable welding levels from 10 to 90
• Includes foot-pedal activation
• Provides two handheld welding electrodes
• Displays the internal battery voltage
• Uses replaceable welding needles
• Features a compact and portable design
• Suits beginners and experienced battery builders

Technical Specifications

• Brand: SeeSii
• Model: SEE-08
• Advertised Peak Power: 8000W
• Welding Method: Resistance spot welding
• Pulse Type: Dual pulse
• Adjustable Levels: 10–90
• Supported Nickel Thickness: Approximately 0.1–0.3mm
• Activation Method: Foot pedal
• Display: Internal battery-voltage display
• Power Source: Internal rechargeable battery
• Recommended Application: Cylindrical battery-pack assembly

Compatible Battery Types

This spot welder suits nickel-strip connections on:

• 18650 batteries
• 21700 batteries
• 26650 batteries
• 32650 batteries
• Ni-Cd battery cells
• Ni-MH battery cells
• Other compatible cylindrical cells

How to Use

1. Charge the spot welder before first use.
2. Connect the welding electrodes securely.
3. Connect the foot pedal to its dedicated port.
4. Clean the battery terminal and nickel strip.
5. Start with a low welding level.
6. Place both electrode tips firmly on the nickel strip.
7. Press the foot pedal to activate the welding pulse.
8. Inspect the weld before increasing the power.
9. Repeat the process after finding a suitable setting.

Welding Guidelines

Start with a low power level and test on spare material. Then, increase the setting gradually until the weld becomes secure.

For best results, keep both electrode tips clean and parallel. In addition, apply even pressure during every weld.

The 0.3mm figure represents the manufacturer’s maximum claim. However, actual results depend on nickel purity, battery charge, electrode condition, and selected power level.

Applications

Use the SeeSii spot welder for:

• 18650 battery-pack assembly
• Power-tool battery repair
• E-bike battery projects
• Portable power stations
• Battery-tab replacement
• DIY power banks
• Electronics workshops
• Battery research and prototyping

Package Contents

The standard package typically includes:

• 1 × SeeSii SEE-08 spot welder
• 1 × Foot pedal
• 2 × Handheld welding electrodes
• Replacement welding needles
• 1 × Charging adapter
• Battery holders
• Nickel strip
• Cleaning file
• User manual

Package contents may vary by supplied batch. Therefore, confirm the included accessories before shipping.

Important Notes

• Wear safety glasses during operation.
• Keep the two electrode tips from touching each other.
• Never weld damaged, swollen, or leaking batteries.
• Do not puncture or overheat battery cells.
• Avoid using the welder while it charges.
• Recharge the unit when the displayed voltage drops below 7.3V.
• Stop operation if the electrodes or cables become excessively hot.
• Allow the unit to cool between intensive welding sessions.
• Test every setting before welding a valuable battery pack.
• The machine primarily targets nickel and nickel-plated strips.