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.

Solar panel with an output voltage of 5.5 V and a power of 0.4 W. It has dimensions of 70 x 70 x 3 mm and pads for soldering the wires

Sthor brand extension cord with anti-overvoltage and overload protection, grounded sockets, child protection, power cut-off switch, solid three-wire cable with a cross-section of 1.5 mm², plastic casing, allows you to power and protect devices at home and in the office, with maximum load 3500 W and thermal protection 16A/250V. Sthor-72371

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

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

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

A two-part set that enables wireless power supply for devices with a voltage of 5V. 7W power can be obtained at a distance <7mm. Maximum efficiency 50%

Step DC-DC converter, Uwe 3.5-30 V, adjustable 4-30 V, RoHS

Step-up DC-DC converter module based on the LM2587 circuit, input voltage 3.5..30V, regulated output voltage 4..30V. The module is equipped with ARK connectors

Lithium Coin Cell Battery, 3V, 12x2mm. BATCR1220-k

Pololu 2832

Pololu 2834

This small synchronous switching step-down (or buck) regulator takes an input voltage of up to 38 V and efficiently reduces it to 6 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 solar cell with a power output of 0.7 W and a voltage output of 5.5 V, measuring 95 x 95 x 3 mm, equipped with pads for soldering wires. Ideal for powering small electronic devices in DIY projects.

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.

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.

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

The R3 Ni-MH AAA 1100mAh XTREME battery is a high-quality nickel-metal hydride (Ni-MH) rechargeable battery with a capacity of 1100 mAh and a voltage of 1.2 V, designed to power devices such as digital cameras, portable CD players, toys, tools, and flashlights. It features the ability to withstand over 1000 charge cycles, no memory effect, and excellent resistance to external conditions such as temperature and moisture.