Kungber Variable DC Power Supply 3A (White) — 0–30V Adjustable Bench Supply with Intelligent Charging & 18W USB

Kungber Variable DC Power Supply is a compact, adjustable 3A bench supply with intelligent charging, safety protections, and an 18W USB output for powering and charging electronics.

This desktop switching regulated supply combines precise voltage/current control with on-board safety features and a user-friendly encoder knob. It fits bench, lab, classroom, repair bench and hobby use where a small, reliable DC source and battery charging/monitoring are needed. The model includes real-time charging display, overcurrent detection, thermal protection, and quick-charge USB, all inside a lightweight housing.

How does the intelligent charging mode work?

The intelligent charging function monitors battery current and accumulated ampere-hours (Ah) so you can see charge progress. When the battery reaches full charge the unit stops charging to prevent overcharging and it detects incorrect polarity to protect the battery and supply.

• Real-time Ah display for tracking battery capacity delivered
• Auto-stop when battery reaches target charge
• Reverse-connection detection to prevent damage
• User-selectable charging parameters via the encoder knob

What safety features protect my device and the power supply?

Kungber built multiple layers of protection into the supply, including overcurrent and short-circuit detection that trips output and signals an alarm. Thermal, leakage, grounding and overload protections reduce risk under prolonged use, and a cooling fan activates if internal temperature rises above the set threshold.

• OCP (overcurrent protection) with audible alarm and output cutoff
• Thermal protection that engages fan at >50°C to cool components
• Leakage and grounding safeguards for safer bench use
• Voltage and power overload mitigation to protect connected loads

How precise and convenient is voltage/current control?

The supply uses a precision encoder knob for smooth, accurate adjustments of voltage and current limits, making fine-tuning simple during experiments or repairs. Digital readouts keep you informed of set and actual values so you can work confidently with sensitive electronics.

• Encoder knob for quick coarse and fine adjustments
• Clear digital display of voltage, current, and charging Ah
• Regulated switching design for stable output under load
• Compact size for limited bench space while remaining portable

What extra conveniences does it offer for everyday use?

Beyond basic power delivery, the supply includes an 18W USB port for fast charging phones or peripherals and comes with output leads and an input cord so it’s ready out of the box. Its lightweight footprint makes transport between stations effortless and setup is straightforward for both novices and experienced users.

• 18W USB interface for rapid device charging
• Includes output power cords and mains input cable
• Weighs under 2.3 lb and fits small workspaces
• Durable components designed for extended service life

Who is this for: The Kungber Variable DC Power Supply is ideal for electronics hobbyists, bench technicians, makers, educators and small labs that need a compact, safe, and accurate DC source with integrated charging and USB convenience. If you repair devices, test circuits, or charge batteries and value a feature-rich yet portable supply, this unit provides a practical balance of control, safety, and usability.