Sunkko 737DH Spot Welder for 18650 14500 21700 Lithium Battery Building

Sunkko 737DH spot welder: professional tool for lithium batteries

The Sunkko 737DH spot welder is a portable and powerful spot welding station designed especially for building 18650, 14500 and 21700 lithium batteries. With an instant power output of 4.3 kW and adjustable current up to 1200A, this welder ensures reliable and precise performance for assembling high-quality battery packs.

Main features:

• Instant power output of 4.3 kW for strong and durable welds.
• Adjustable welding current up to 1200A to suit different needs.
• Working modes with 1, 2, 4, 6, 8, 10, 12, 14 and 18 pulses for maximum versatility.
• Configurable delayed start between 0.4 and 1.5 seconds for greater control.
• Fixed welding head with adjustable pressure from 200 to 700 grams.
• Mobile head (welding tweezers) with 40 cm cables for easier access to hard-to-reach areas.
• Foot switch (pedal) with 140 cm cable for convenience during use.
• Automatic or manual pedal control to suit user preferences.
• 2-digit LED displays showing the pulses and welding current.
• Robust metal housing with non-slip rubber pads for stability.
• AC 220V, 50Hz, 15A power supply with 1 metre cable and Schuko plug.
• Compact dimensions of 230x140x200 mm for easy transport and storage.

Typical use and compatibility:

The Sunkko 737DH spot welder is designed for users who require precision and reliability when building lithium batteries, especially in 18650, 14500 and 21700 formats. It is ideal for repair workshops, custom battery manufacturing and electronics projects that require professional spot welding.

Thanks to its two head types (fixed and mobile), it allows comfortable work on small batteries and larger packs. Foot pedal control makes continuous and safe operation easier, while the ability to adjust power and pulses ensures optimal results with every weld.

Kit contents:

• 1 spot welding machine with AC power cable.
• 1 mobile welding head (welding tweezers).
• 1 foot switch (pedal).
• 1 L-shaped hex key.
• 2 x 20A fuses.
• 4 welding tips for fixed head.
• 2 welding tips for mobile head.
• 1 grinder for welding needles.
• 1 battery holder (template).
• 1 user manual in English.

Important note: The warranty does not cover fuses or welding tips, as these are consumable items that require periodic replacement.

• Instant 4.3 kW power for strong, precise welds.
• Adjustable current up to 1200A for different battery types.
• Multiple pulse modes (1 to 18) for maximum versatility.
• Fixed and mobile heads for easier welding on different sizes.
• Foot switch for comfortable hands-free control.
• LED displays to monitor pulses and current.
• Metal housing with non-slip pads for stability.
• AC 220V power with Schuko plug for easy connection.