Acts as a standard boosted power supply with comprehensive protections including overvoltage, overcurrent, over power, over temperature, and undervoltage protections. Includes a constantcurrent charging function and can charge various small rechargeable batteries across a range of 0.6 V to 30 V, up to 15 W. USB voltages regulator that boosts 5 V to 12 V and features an integrated voltmeter, ammeter, and signal generator. The regulator provides accuracy digital displays, delivering exact readings for voltage, current, and frequency. Use scenarios Electronics development and bench testing: power 12 V devices from a USB source, monitor voltage and current with the builtin meters, and use the signal generator for test signals without additional equipment. Battery charging and maintenance: safely charge small rechargeable batteries within the 0.6–30 V range using the constantcurrent mode, up to 15 W, suitable for lightweight charging tasks. Field and portable testing: convert USB power to 12 V for onsite device operation, with protective features to safeguard connected equipment and visible readouts for quick checks.