XL6009 DC-DC Adjustable step-up power converter module, the step-up circuit board is a good efficiency non-isolated boost module
Input: DC 3 V to 30 V, optimum operating voltage range: 5V to 30V; Output: DC 5 V to 35 V voltage is continuously adjustable, maximum output current is 4 A
Step-up boost converter module: they can fix on the emergency lamp or other electronic devices between the corresponding voltage range, DIY an output adjustable mobile power, boost charger, etc.
DSN6009 is a good-performance 400KHz 4A switch currency step-up boost module; This module XL6009E1 is coming with the 3rd generation high-frequency switch technology as the core chip, the performance is much higher than LM2577
Warning: this is only for the increasing output voltage; The input voltage should not be over 30 V to avoid any possible damage