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 

The XT90 to XT60 adapter allows for direct connection of components with various power connector standards. It\'s ideal for robotic projects, modeling projects, and test systems where quick adaptation of the power source to a specific device without modifying the installation is essential

Lithium-polymer battery type LP503759 with a nominal voltage of 3.7 V and a capacity of 1350 mAh, equipped with a PCM protection circuit and a JST 2.54 2-pin connector on a 150 mm cable. Akyga AKY0107

Pololu 5V Step-Up/Step-Down Voltage Regulator S18V20F5

Photovoltaic panel allows conversion of solar radiation into electrical energy. It has 1W power and 6V output voltage, and its design has dimensions of 125 x 63mm. The panel is flooded with resin, which protects it against dirt and mechanical damage. Solar Panel 1W

LP803450 lithium-polymer battery with a nominal voltage of 3.7 V and a capacity of 1500 mAh, equipped with a PCM protection circuit and a 150 mm lead terminated with a JST 2.54 2-pin connector. Akyga AKY0647

LP903450 lithium-polymer battery with a nominal voltage of 3.7 V and a capacity of 1600 mAh, equipped with a PCM protection circuit and a 150 mm lead terminated with a JST 2.54 2-pin connector. Akyga AKY0099

Alkaline GP Ultra + C R14 battery (1.5V voltage) 1 piece. Weight 60g

PoE Splitter Type-C 5V Seeed Studio 114992901 is a power splitter that enables connecting hotspots and IoT devices without built-in PoE support to both network and power through a single Ethernet cable. Thanks to support for IEEE 802.3 af/at standards and a metal housing, it ensures stable operation and wide compatibility with Helium hotspots and LoRaWAN gateways.

The XT60 to XT90 adapter allows for the integration of power sources and devices using different connector standards. This product is suitable for robotic projects, modeling, and test setups where flexibility in battery and power source selection is essential.

The compact (0.4″ × 0.5″) D24V5F2 synchronous buck voltage regulator takes input voltages between 3 V and 36 V and efficiently reduces them to 2.5 V while allowing for a maximum output current of 500 mA. This regulator offers typical efficiencies between 80% and 90%. The pins have a 0.1″ spacing, making this board compatible with standard solderless breadboards and perfboards.

The Step-Down D24V6F12 Buck Voltage Regulator module gives the output voltage of 12V with a wide input voltage range of 15-42V and a maximum output current of 600 mA. Pololu 2109

XT90 to Traxxas adapter allows quick and safe connection of batteries with an XT90 connector to devices using the Traxxas standard. Used in RC models and high-power supply systems, it provides simple connector conversion without the need for soldering.

The very small step-down 6 V, 2.5 A synchronous inverter can be supplied with voltage up to 36 V, dimensions: 17.8 mm x 17.8 mm. Pololu 2859

The Step-Down D24V6F9 Buck Voltage Regulator module gives the output voltage of 9V with a wide input voltage range of 11.5-42V and a maximum output current of 600 mA. Pololu 2108

This powerful boost regulator efficiently boosts input voltages as low as 2.9 V to a higher, adjustable output voltage between 9 V and 30 V while allowing an input current as high as 5 A.

This small synchronous switching step-down (or buck) regulator takes an input voltage of up to 36 V and efficiently reduces it to 7.5 V. The board measures only 0.7″ × 0.7″ yet delivers a typical continuous output current of up to 2.4 A and features reverse voltage protection.

Wireless charging uses an electromagnetic field to transfer energy between two objects. This is usually done with a charging station. DFR0362

The compact (0.4″ × 0.5″) D24V5F9 synchronous buck voltage regulator takes an input voltage of up to 36 V and efficiently reduces it to 9 V while allowing for a maximum output current of 500 mA. Pololu 2845