DC Power Supply Variable 30V 10A Adjustable - Compact Bench Unit

In this review the Kungber DC power supply proves to be a sensible choice for hobbyists, small labs and repair benches that need a compact, accurate and safe adjustable supply. The single biggest reason to buy is its combination of intelligent charging with comprehensive safety detection, which lets users charge batteries while monitoring real-time charging power and automatically stopping when the battery is full. It is also light and compact enough for portable use without sacrificing useful features such as an 18W USB output and an overcurrent detection alarm.

Key Features

• Intelligent Charging: Displays charging power (Ah) in real time and stops charging automatically when the battery is full for safer battery maintenance.
• Overcurrent Detection Alarm: The OCP button enables detection of short circuits and overcurrents, triggering an alarm and cutting output to protect connected devices.
• Compact Footprint: Weighing under 2.3 lb and sized at 7.59 x 3.35 x 6.1 in, it fits small benches, classrooms and mobile work setups where space is limited.
• 18W USB Interface: Built-in USB output provides a convenient 18W high-speed charge for phones or accessories without needing a separate charger.
• Thermal and Electrical Protections: Includes grounding, leakage, thermal, voltage overload, power overload and short-circuit protections to extend component life and improve reliability.
• Precision Control: Encoder knob and regulated switching design let users make fine voltage and current adjustments for accurate testing and tuning.

Who It's For

This unit is ideal for electronics hobbyists, small repair shops, school labs and anyone needing a lightweight, accurate bench power supply for tasks such as battery charging, motor testing and lamp or aging tests. The intelligent charging and safety detection are particularly helpful for users who will frequently charge batteries or test cells and want automatic protection.

Professionals who require very high continuous power or rack-mounted industrial supplies should look elsewhere, as this compact unit is optimized for portability and bench use rather than heavy continuous industrial duty. Similarly, if you need multiple isolated outputs or advanced programmable sequencing, a lab-grade programmable supply would be a better fit.

Pros & Cons

Pros

• Accurate and stable voltage output with fine adjustment, matching customer reports of precise voltage control.
• Comprehensive safety features including thermal protection and an overcurrent alarm reduce risk during testing and charging.
• Lightweight and compact design makes it easy to move between workspaces and ideal for small benches.
• Useful onboard 18W USB port for charging mobile devices while working.

Cons

• Not intended for heavy continuous industrial loads; designed primarily for bench and light lab duties.
• Single output design limits use when multiple isolated rails are required.

Specifications

Model type	Variable DC bench power supply
Output range	Up to 30V, 10A
USB output	18W high-speed USB port
Dimensions	7.59 x 3.35 x 6.1 in
Weight	Under 2.3 lb
Safety features	Grounding, leakage, thermal, voltage overload, power overload, short-circuit protection
Included	Output power cords, input cord, user manual and technical support

Our Verdict

The Kungber DC Variable 30V 10A supply is a practical, budget-friendly bench unit that delivers accurate voltage control, intelligent battery charging and a strong set of safety protections in a compact package. It is a good value for hobbyists, educators and small repair shops that need reliable, portable power and simple battery charging features without the cost or size of larger lab supplies.

Frequently Asked Questions

Does it stop charging automatically when a battery is full?
Yes. The intelligent charging mode displays charging power and stops charging when the battery reaches full charge to prevent overcharging.

Is there protection against short circuits?
Yes. The unit features an overcurrent detection alarm (OCP) that detects short circuits and overcurrents, sounds an alarm and stops output.

Can it charge phones or USB devices?
Yes. The built-in 18W USB interface provides high-speed charging for phones and accessories while the supply is in use.