Review on ⚡️ Adjustable Voltage Regulator 0.5-30V 4A 5V 6V 12V 24V Power Module - DC DC Buck Boost Converter for CC CV, Ideal for Laboratory Power Supply by Mike Skinner

I will buy 2 more of these AC units. This is the one I use as the input voltage (13-18VDC) for a homemade alkaline battery charger. I can charge AAA x 4/8, AA x 4/8, 9V and A123 batteries. The energizer is best charged to a full charge of 1.65. Duracell easily goes to 1.5 volts. This device works great with my solar panels which fluctuate between 14.4 and 11.5 volts. I used to have to wait until the battery voltage was between 13.5 and 12 volts or my chargers and other electronic circuits would go haywire. This unit (next one I will be buying) will work great, offering adjustable wattage for stable circuit operation and variable wattage from 9-18. Testing the volt circuit with a 555 timer chip.