Step-Down converter D36V50F9 with an output voltage of 9 V, an input voltage from 9.9 to 50 V and a maximum output current of 7 A. Pololu 4094

Battery charger Blow 12V/10A – 24V/5A is an advanced device designed for charging and maintaining a wide range of batteries used in vehicles and battery-powered devices. Automatic modes that adjust charging parameters, a built-in LCD display, and a battery regeneration function make this charger an ideal tool for both individual users and professionals. It is suitable for passenger cars, trucks, motorcycles, boats, and emergency power systems.

Panasonic AAA 1.5V LR3 Alkaline Battery is a reliable power source, perfect for everyday devices such as remote controls, toys, and flashlights. With high-quality construction, it ensures long-lasting and stable performance for various electronic devices.

A miniature module with a LiPo battery charger with a capacity of 500 mA. SparkFun DEV-11893

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.

Car charger 12/24V Akyga AK-CH-10 45W 4x USB-A 5V / 9A modular black. Akyga AK-CH-10

The Step-Up Buck Voltage Regulator module with output voltage of 3.3V and input voltage range of 1-3V and a maximum output current of 200 mA. STMicroelectronics EVAL4971

The REBEL RB-168 battery tester is a compact, lightweight, and easy-to-use tool for quickly checking the charge level of the most common battery types. Powered directly by the tested battery and featuring an analog indicator, it requires no additional accessories. Its universal design makes it suitable for both home and professional use.

DC-DC Step-Up / Step-Down converter module. It has an input voltage of 6 to 35 V and an output voltage of 1 to 33 V. The current efficiency of the inverter is 0.05 to 5 A. DFRobot DFR0946

The S9V11F5S6CMA switching step-up/step-down regulator efficiently produces a fixed 5 V (default) or 6 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.)

Module with a single-purpose LiPo charger with adjustable charging current in the range from 15 to 500 mA. It is equipped with a JST PH connector, pins and a 2450 type socket. SparkFun PRT-14380

Fast XTAR SC1 processor charger for lithium-ion cells in sizes 18650, 18700, 20700, 21700, 22650, 26650. It is equipped with LEDs showing the state of charge, three-stage charging processor TC / CC / CV, function of reacting deeply discharged cells, security: short-circuit, thermal, against reverse polarity. It can be charged with any USB power charger (min. 2.1A)

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

This synchronous switching step-down (or buck) regulator takes an input voltage of up to 40 V and efficiently reduces it to 6 V with an available output current of around 15 A. Pololu 2882

Step-Down DC-DC converter module based on the D24V150F12 chip. Input voltage 14.5 ... 40V, output voltage 12V (max 15A). Pololu 2885

This synchronous switching step-down (or buck) regulator takes an input voltage of up to 40V and efficiently reduces it to 5V with an available output current of around 15A. Typical efficiencies of 80% to 95% along with its high current capabilities make this regulator well suited for powering large loads. Pololu 2881

DC voltage converter with adjustable and stabilised output voltage from 0.5 V to 32 V. It can handle loads up to 4 A and has an output of up to 50 W. It features a colour display and a handy user interface. Fnirsi DC/DC converter 50W

The charger module is designed for 2 Li-Ion cells. It is equipped with a micro USB and USB type C connector and supports fast charging (QC).

The charger module is designed for 5 Li-Ion cells. It is equipped with a micro USB and USB type C connector and supports fast charging (QC).