Solar panel with an output voltage of 5.5 V and a power of 0.4 W. It has dimensions of 65 x 65 x 3 mm and pads for soldering the wires

The Step-Up / Step-Down S18V20F12 inverter module gives the output voltage of 12V with a wide input voltage range of 3 ... 30V and a maximum output current of 2A. Polol 2577

Step-Up/Step-Down DC-DC converter module. It has an input voltage of 2.8 to 22 V, an output voltage of 12 V and a maximum output of 2.5 A to 3.5 A. Pololu 4985

The battery tester is a compact device that allows you to check in a very simple and quick way whether the batteries or rechargeable batteries we use are functional. Our devices require good batteries or accumulators and we are often not sure if our equipment has the right power supply to withstand, for example, during a trip or celebration. Nothing easier, you can check it using a tester.

The module enables the distribution of the supplied power between the connectors located on the board. It has a built-in power switch to control the system. The maximum voltage on each connector is 24 V.

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

The BLOW SUPER HEAVY DUTY 9V 6F22 battery is an efficient and durable power source, perfect for remotes, smoke detectors, microphones, and other electronic devices. Thanks to SUPER HEAVY DUTY technology, it provides stable voltage and long lifespan for everyday use. Packed in a practical blister for convenience and protection.

A DC-DC voltage converter, based on a combination of an LM2577S Step-Up converter and an LM2596S Step-Down converter. The input voltage can range from 3.5 V to 28 V, and the output voltage is adjustable from 1.25 V to 26 V

The LM7805 5V 1.2A linear stabilizer module is a reliable and easy-to-use voltage stabilization solution for all electronics projects. Thanks to its solid construction, built-in protections and high efficiency, this module provides a safe and constant 5V power supply, being an invaluable component in the work of every electronics engineer

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

The symmetrical power supply based on LM317 and LM337 offers a DC output in the range of 1.3-25 V with a power of 25W and a current of up to 1A. Equipped with a resettable fuse for overload protection, it is compact with dimensions of 62 x 59 x 30 mm.

The LM317 + LM337 Symmetrical Power Supply provides stable and smoothly regulated symmetrical voltage for electronic and laboratory applications. Suitable for powering audio systems, preamplifiers and test projects where stable, regulated symmetrical voltage is essential. Requires consideration of proper cooling to maintain optimal operating conditions

The module provides convenient and safe power supply for projects on breadboards with different voltage levels. It is useful when designing and testing electronic devices, microprocessor systems and prototype systems requiring stable and precise power supply

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.

Akyga AK-PS-04 is a portable emergency power source with multiple ports, ideal for portable and larger devices such as travel refrigerators. It has three USB ports (including one type C), two 5.5x2.1 mm DC sockets, a 12 V cigarette lighter socket and two AC sockets. It can power up to 8 devices simultaneously. It is equipped with an LCD display to monitor the operating status and battery charge level. It can be charged via USB-C, a 120 W power supply or photovoltaic panels. Perfect for outdoor travel and emergency power. Akyga AK-PS-04

DC-AC converter, also referred to as an inverter. Converts a constant voltage (DC) of 12 V to an alternating voltage (AC) of 220 V

The charger module is designed for 3 Li-Ion cells. It is equipped with a micro USB and USB type C connector and supports fast charging (QC).

The Akyga AK-SC-E11 adapter allows you to convert the CCS1 connector to CCS2, which is useful when only the CCS1 connector is available at the fast charging station and the electric car has a CCS2 socket. This adapter makes DC charging simple and fast. Akyga AK-SC-E11

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