CC/CV Step Down Buck Lithium Battery Charging Board XL4015 Charger DC-DC Converter Module This linear module has constant voltage and constant current (CC CV) function. and it has a good performance.when you use it as a charger. This module uses good chip as core and is stable. Also its ripple is low to 50mV. Size: 51*26.3*14(L*W*H)(mm) Operating Temperature: -40° to +85° Voltage Regulation: ±2.5% Load Regulation: ±0.5% Output Ripple: 50mV (max) 20M bandwidth Switching Frequency: 300KHz Conversion Efficiency: 95% (the highest) Output current: maximum adjustable 5A Output voltage: 0.8V-30V Input voltage: 5V-32V Rectification: non-synchronous rectification Module properties: non-isolated module constant current and voltage. Advantage: CC CV low ripple When the module charges a battery, first.