Portable Buck-Boost ZK-4KX Case

🔋 Portable Adjustable DC Bench Power Supply (Battery Powered, CC/CV)

This is a compact, battery-powered adjustable DC bench power supply built around the ZK-4KX buck-boost converter module. It provides constant voltage (CV) and constant current (CC) control in a portable enclosure powered by 18650 lithium cells.

Perfect for makers, electronics hobbyists, and field troubleshooting where a wall outlet isn’t available.

⚙️ Features

• Adjustable output voltage (0.5V–30V depending on input)
• Adjustable current limit (CC mode for safe testing)
• Short-circuit protection
• Portable 18650 battery operation
• USB charging / UPS functionality
• Banana plug outputs for universal compatibility
• 5.5×2.1mm barrel compatibility

🔌 Typical Use Cases

• Powering ESP32 / Arduino projects
• Router or small DC device backup power
• Testing LED strips and modules
• Prototyping circuits safely
• Field diagnostics
• Portable lab supply for makers

🔋 Power Capability

Designed for approximately 10–15W continuous output when battery powered (depending on configuration and cooling).

Great for low to medium power electronics projects.

🛠 Build Notes

• Uses 1S (parallel) 18650 configuration
• Center-positive barrel standard
• Polarity reversible via banana terminals

🎯 Why This Design?

Commercial bench supplies are bulky and require AC power.
This build provides a compact, adjustable, battery-powered alternative that fits on a workbench or in a tool bag.