This 3S 20A BMS board protects three series lithium-ion 18650 batteries from overcharging, over-discharging, and short circuits. It is commonly used in custom battery packs for power tools, electric bikes, and portable electronics to keep your batteries safe and extend their lifespan.

The LM2596 buck converter is a step-down voltage regulator that lets you adjust a higher input voltage down to a lower, stable output voltage efficiently. It includes a tiny screw dial to fine-tune the voltage. It is commonly used in DIY power supplies, battery projects, and running 5V modules from a 12V source.

A 10W transformer is an electrical device that changes AC voltage from your wall outlet to a lower, safer voltage for your electronics. It uses magnetic coils to step power down. People commonly use this component in small power supplies, audio equipment, LED lighting setups, and various DIY electronics projects that require safe, low-voltage power.

A 5v power supply is an electronic device that converts standard wall outlet electricity into a stable 5-volt direct current output. It provides safe, steady power for your electronics. This power supply is commonly used to run Arduino boards, Raspberry Pi computers, LED strips, sensors, and many other low-voltage digital projects.

A 3.7v lithium battery is a rechargeable power source known for its high energy density and lightweight design. It provides steady power for portable electronics. This battery is commonly used in smartphones, wearable tech, small drones, portable speakers, and custom rechargeable DIY microcontroller projects.