Overview
The DH30 Mini Portable Spot Welder is a professional-grade, pocket-sized welding tool designed specifically for building and repairing lithium-ion battery packs (18650, 26650, 32650, etc.). Equipped with an upgraded 0.91-inch OLED screen, it allows you to precisely monitor your settings in real time. With 30 levels of adjustable output power, you can easily fine-tune the weld energy to match various thicknesses of pure nickel or nickel-plated steel strips, ensuring a secure joint without damaging delicate battery cells.
Key Features
30 Adjustable Power Gears: Ultra-fine control over the discharge current allows you to weld everything from ultra-thin 0.1mm strips up to 0.2mm nickel sheets.
0.91″ OLED Display UI: Crystal-clear screen displays the current gear, real-time internal temperature, battery level, and welding output status.
Built-in High-Rate Battery: Equipped with a premium rechargeable lithium polymer battery, enabling thousands of continuous welds on a single charge.
Dual-Purpose Power Bank: Features a standard 5V USB output port, allowing the spot welder to double as a portable power bank to charge your smartphone or microcontrollers.
Detachable Quick-Release Welding Pens: Gold-plated, low-resistance welding pens ensure maximum current conductivity and remain cool during prolonged use.
Technical Specifications
| Feature | Specification |
| Model | DH30 Max / V2 |
| Screen Type | 0.91 Inch OLED Display |
| Output Voltage | 4.2V (Max) |
| Output Current | 650A (Max) |
| Power Adjustment | 1 to 30 Steps / Gears |
| Welding Thickness | 0.1mm – 0.2mm (Nickel Plated Strip) |
| Input Charging Port | USB Type-C (5V / 2A) |
| Output Port (Power Bank) | USB-A (5V / 2.4A Max) |
| Shell Material | Aviation Grade Aluminum Alloy |
Safety and Maintenance
Over-Temperature Protection: The onboard logic automatically cuts off welding cycles if the system detects the internal temperature has exceeded safe thresholds.
Auto-Sleep: Automatically powers down after periods of inactivity to conserve internal battery life.


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