Step-Down converter with adjustable output voltage from 1.25 to 36 V, input voltage from 4 to 38 V and maximum current up to 5 A. Board equipped with a voltmeter with display

This small synchronous switching step-down (or buck) regulator takes an input voltage of up to 38 V and efficiently reduces it to 9 V. The board measures only 0.7″ × 0.7″, but it allows a typical continuous output current of up to 2.5 A. Typical efficiencies of 85% to 95% make this regulator well suited for powering moderate loads like sensors or small motors.

A simple DC power supply with an output voltage of 12.6 V DC and a current of 10 A. The device can be powered with a voltage of 8 to 36 V DC. It can be used to charge Li-Ion batteries, it will also work well for powering devices such as LED lighting. SparkFun PRT-18722

The S9V11MA switching step-up/step-down regulator efficiently produces a finely adjustable output between 2.5 V and 9 V whether it is higher or lower than the input voltage, which can range from 2 V to 16 V.  Pololu 2869 

Step-Up DC-DC converter module. It has an input voltage of 1.3 to 16 V, an output voltage of 5 V and a maximum input of up to 2 A. Pololu 4941

The trigger module is designed for chargers PD 2.0 and PD 3.0. It is equipped with a USB type C input and a USB type A output. It enables powering devices with 9 V or 12 V and testing chargers. PDC005

The S9V11F3S5CMA switching step-up/step-down regulator efficiently produces a fixed 3.3 V (default) or 5 V (selectable) output whether it is higher or lower than the input voltage, which can range from 2 V to 16 V. (Note: minimum start-up voltage is 3 V, but it operates to 2 V after that.)

BMS module for three Li-Ion cells with a voltage of 11.1 V. It has the function of charging with a balancer, discharging and over-discharge protection. The cells can be charged with a continuous current of up to 12 A

Step-Up converter U3V70F15 with an output voltage of 15 V, an input voltage from 2.9 to 15 V and a maximum output current of 10 A. Pololu 2896

Step-Up converter U3V70F7 with an output voltage of 7.5V, an input voltage from 2.9 to 7.5 V and a maximum output current of 10 A. Pololu 2893

Step-Up converter U3V70A with an output voltage from 4.5 to 20 V, an input voltage from 2.9 to VOUT and a maximum output current of 10 A. Pololu 2890

The trigger module is designed for chargers PD 2.0 and PD 3.0. It is equipped with a USB type C input and an output in the form of pads. Allows powering devices with 20V. PDC004

The trigger module is designed for chargers PD 2.0 and PD 3.0. It is equipped with a USB type C input and output on pads. Allows you to power devices with 5 V, 9 V, 12 V, 15 V and 20 V and test chargers by replacing the PD device

Step-Down converter with an output voltage of 5 V, input voltage from 9 to 36 V and a maximum current of 5 A. The board is equipped with a DC input connector and an output USB connector

The protection circuit for one Li-Ion cell with a voltage of 3.7 V. It has the function of charging, discharging and over-discharge protection. The cells can be discharged with a continuous current of up to 8 A

Safety system for two Li-Ion cells with 11.1V. The module has the function of charging cells with the balancer, discharging and the function of protecting the cells against discharge. Cells can be charged with continuous current up to 20A and discharged with current 40A. modBMS40A