SUNSHINE P4 Pro Smart Regulated Power Supply

Bench space is always short, and a large lab supply can take up room you'd rather give to a microscope. The SUNSHINE P4 Pro is a compact desktop supply sold for phone board testing and diagnosis.

The P4 Pro from SUNSHINE has smart regulated, adjustable output, current and voltage monitoring on a digital display and protection against overload and short circuits. The listing calls it high precision but doesn't give the output range or resolution.

When the P4 Pro is useful

• A dead board that needs current-limited power.

• Abnormal consumption after a drop or liquid damage.

• Long repair sessions that need steady power.

• A small bench where space matters.

Before buying

Check the photos for the display and output terminals, and confirm the ratings cover the phones you repair. The listing doesn't say what makes the regulation smart.

Observe current consumption carefully during power-up, as the listing advises. A board that settles at its usual idle current is healthy at that stage; one that climbs steadily or spikes deserves a closer look before you go further.