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

Water Turbine Generator is a water turbine that generates electricity. 5V output voltage on the turbine is achieved at a flow of 4l / min. DFRobot SEN0229

A universal travel adapter that converts power sockets from different regions, allowing you to power devices in the range of 110-250V at a current of up to 10A. Akyga AK-AD-61

A power supply dedicated to the analysis of energy consumption by devices in embedded systems. Based on ESP32, it allows you to transfer data to a computer via a USB interface. Odroid SmartPower 3

DC-DC Step-Down Converter ME3116AM6G with an output voltage of 5 V, input voltage from 6 to 24 V and a maximum output current of 1 A. Dedicated to the M5Stack modules. M5Stack U125

Step-Up/Step-Down DC-DC converter module. It has an input voltage of 2.8 to 22 V, an output voltage of 7.5 V and a maximum output of 2.5 A to 3.5 A. Pololu 4982

Rechargeable NiMH Battery Pack: 6.0 V, 2200 mAh, 3+2 AA Cells, JR Connector

XT60EW-M connector (male plug) with a maximum conduction current of 20 A. Equipped with mounting holes, it will work as a battery connector or power connector in RC models. Amass XT60EW-M

The S9V11MACMA 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 3 V to 16 V. The regulator also has a precision-adjustable low-voltage cutoff with hysteresis that can be used to prevent battery over-discharge.

5V/1A and 5W power supply with a 5.5 x 2.1 mm plug, suitable for tablets, routers, switches, modems and other devices. Akyga AK-TB-08

Step-Down Voltage Regulator D24V25F5. Pololu 2850

DC-DC Step-Up/Step-Down Converter Module. It has an input voltage of 1.4 to 16 V, an output voltage of 3.3 V and a maximum output current of 1 A to 1.5 A. Pololu 4964

Rechargeable NiMH Battery Pack: 8.4 V, 2200 mAh, 4+3 AA Cells, JR Connector

AK-TB-10 is a power supply unit with parameters 12V/1A and 12W power with a 5.5 x 2.1 mm plug, suitable for LED strips and other devices. Akyga AK-TB-10

Folding solar panel with an output voltage of 5 V and a current capacity of max. 1.5 A. It has the dimensions of 165x105x15 mm (folded) and a USB port

PRT-10217 - LiPo Charger Basic - Micro-USB

The Verbatim Universal Travel Adapter is a reliable charging device that connects to power sources worldwide, supported in over 180 countries. Equipped with two USB-A ports, it allows you to charge a variety of devices, including smartphones, tablets, Bluetooth speakers, power banks, e-book readers and devices that require direct power, such as laptops and camera batteries. Verbatim 49543

BMS system for four Li-Ion cells with a voltage of 16,8 V. It has the function of charging with balancer, discharging and over-discharge protection. The cells can be charged with continuous current up to 60 A and discharged with current up to 80 A

Gravity: I2C 3.7V Li Battery Fuel Gauge is a module for monitoring the parameters of the Li-ion battery allowing for precise measurement of the flow of charge to / from a 1-source source with an input voltage of 2.5-4.2V. DFRobot DFR0563

Set of 2 Panasonic Eneloop R3/AAA rechargeable batteries with 800 mAh capacity and 1.2V voltage. Packaged in eco-friendly packaging (blister). Panasonic BK-4MCDE/2BE