Auto Step Up/ Down Power Supply DC Converter Constant Current Buck Boost Module
Conversion efficiency: 87 ~ 91%(Boost); 87 ~ 89%(Buck). Output ripple: 20mV (12V 3A), while the common module is far more than 100mV! Spot Welder. 45 In 1 Sensor. Battery Protection Board. Output current: 3A (add heat up to 4A).