Cermant 20 Pcs DC-DC Boost Converter Module 3.7V to 5V/8V/9V/12V Adjustable Step Up Board, 1.5A Max Output with LED Indicator, for DIY Electronics Projects

["【VERSATILE VOLTAGE BOOSTER & 20 PACK VALUE】 Boost your 3.7V lithium battery or other low voltage sources (2.5V-11.5V) to stable 5V, 8V, 9V, or 12V output. Get 20 high-quality modules for extensive projects or backups. ","【COMPACT & CONFIGURABLE DESIGN】 Ultra-small size (22x11x3.6mm) fits into tight spaces. Easily set output voltage via onboard A/B solder pads. The onboard LED indicator can also be disabled by soldering for low-power applications.","【STABLE OUTPUT PERFORMANCE】 With a maximum output current of 1.5A, this module can reliably deliver up to 5V/1.2A, 8V/0.7A, 9V/0.6A, or 12V/0.5A (with 3.7V input). Ideal for powering microcontrollers, sensors, and small motors.","【WIDE DIY & REPAIR APPLICATIONS】 Perfect for Arduino, ESP8266/32 projects, portable chargers, LED strips, replacing old battery packs, or upgrading electronic devices that require a higher voltage from a single-cell lithium battery.","【EASY-TO-USE 】 Default output is 12V. Simple soldering required to change voltage. Clear pad logic (A/B=0/1) is printed on board making configuration quick and foolproof for beginners and experts."]