4 Cell 18650 Lithium ion Battery Holder This 18650 Lithium ion Battery Holder is a high-quality Lithium battery holder that can hold four 18650 Lithium batteries. It's a space-saving battery holder with built-in PCB protective circuits for securing rechargeable 18650 Lithium-Ion Cells with increased energy density and reduced weight. This Lithium ion Battery Holder is designed for 3.7-volt, high-energy, low-weight mobile electronics, industrial, and telecommunications applications that require circuit protection to prevent battery damage. Applications: Computer memory, power backup systems Digital readers Laptop and touchpad computers PLC and industrial controls

4 Power Indicator Battery Detection Module A Power Indicator Battery Detection Module is a gadget that detects the charge level in a battery and displays the remaining power level to the user. It often contains a voltage divider circuit that can convert the battery voltage to a level that a microcontroller or other device can read, as well as an indicator circuit that may display the remaining power level using LEDs or other visual means. The Power Indication Battery Detection Sensor Module you indicated most likely has four LEDs or other indicator lights to indicate different degrees of remaining power, such as a green LED for full power, a yellow LED for medium power, and a red LED for low power. Onboard high precision voltage detection chip and power supply voltage chip.Four onboard battery indicator light-emitting diodes (leds). T hree kinds of color display, red, yellow, green, representing 20%, 50%, 80%, 100% of the battery. Set aside all the batteries testing interface and the two positioning hole. By Removing the LEDs and extending their connections to arduino, this module can also be used with all arduino boards. PCB Size: 22.2(mm)x17.2.(mm)

4 x 1.5V AA battery holder with cover and On/Off Switch This 4 x AA 1.5V battery holder case is ideal for projects that require a 3V external battery. It is designed to hold 4 AA batteries, which are connected in series to provide a combined output of 3V. The holder features a plastic cover that can be locked to protect the battery cells from environmental factors. A removable sliding cover is also included, which is secured by a small head screw. The leads are approximately 15cm in length, with the last 5mm tinned for easy soldering and connection. An on/off switch is built into the battery holder case, which allows for easy control of power to your project. This battery case is designed to keep your batteries organized and protected. Key Features: Holds four AA batteries. Easy to install and use. Durable plastic construction. Includes ON/OFF switch.

400 Tie Points Solderless Breadboard The 400 Tie Point solderless breadboard is perfect for building and testing electronics, especially with Arduino projects. It’s made of strong plastic with metal clips that hold wires securely. With 400 points, you can quickly set up circuits without soldering, making it easy to try different designs. It has space for components like resistors and LEDs and works with various wire sizes. This prototyping breadboard for DIY electronic projects supports wire sizes ranging from 20 to 29 AWG. With two power lanes and a double-strip layout, this 400 points prototyping board offers ample space for various electronic components, including resistors, diodes, transistors, LEDs, and capacitors. This durable and compact solderless breadboard is designed to accommodate jumper wires with a diameter of 0.8 mm and standard 2.54 mm hole spacing. This is small, reusable, and has a sticky back to keep it steady while you work. Its color-coded layout helps you stay organized, making it simple and useful for all kinds of electronic experiments. Check out: WB-102 840 Points Solderless Breadboard Explore What is Breadboard for electronics projects. Features: 400 tie points, solderless design. Fits 0.8mm jumper wires, standard hole spacing. Two power lanes, double strip for more space. Strong plastic body, secure metal clips. Compact size, adhesive back for stability. Supports 20-29 AWG wires. Ideal for resistors, LEDs, capacitors, and more Applications: Rapid Prototyping Educational Use Experimentation Project Development Circuit Modification Compatibility Testing Temporary Connections Robotics and IoT

400kV High Voltage Generator 3-6V DC High Voltage Pulse Generator The 400kV High Voltage Generator offers reliable and powerful performance for your electrical projects. This 3-6v DC pulse generator is ideal for use in automotive, communication, medical or industrial applications that require high voltage levels to be generated. The device has a built-in safety protection feature which prevents it from overloading or damage caused by incorrect connections. Its highly efficient cooling system allows effective generation of power even at higher temperatures while the compact size makes this unit perfect for tight spaces and restricted locations . Additionally , its robust construction ensures durability backed up with warranted reliability resulting in outstanding long term performance without any service interruptions due to faulty components during operation time periods. With all these features combined together , the  High Voltage Generator promises top notch quality product guarantees hassle free operations every single time! This is a high-voltage step-up power supply module or boost converter that is often used in electronics demonstrations and experiments. Where a 3-6V input from a standard Li-ion battery can create a voltage of up to 400KV. The Tesla coil principle is used in this high-voltage module. Wiring Instructions: Input: Red(+) and Black(-) Output: Same Colour wires on Opposite side. Note: Output ends of cable should be adjusted properly before power on, and the arc distance depends on battery voltage and capacity. The arc distance should be from short to long, do not produce a longest arc at first or the module might be damaged easily. The module has high power and inner heat is not easily dissipated, so it can not work continuously for long time (<10 seconds each time)

40x1 Female Berg Strip This is a 40x1 Pin Berg strip female connector that has the industry-standard spacing of 2.54mm and is designed for soldering directly into printed circuit boards (PCB) . They are supplied Best for the extension of pins of Microcontrollers and ICs. This 40x1 Berg Strip Female Connector is used with custom PCBs or general custom headers. This berg strip female connector can be cut into the desired section and this is an ideal connector for the PCB board and integrated circuit used widely in the computer and breadboard . It has a pitch (distance between two pins) of 2.54 . This Berg strip connector with 2.54mm pitch is an accessory that can be used with any of our LCD , OLED , or VFD modules, as well as any PCB requiring pin headers. Key Features: Standard 2.54mm pitch, Solderable to PCBs, Customizable length, Versatile usage, Wide compatibility, Durable construction, Easy installation. Applications: Used to connect the PCB prototype and the breadboard The docking of the small board and the breadboard As a through stacking head on the PCB How to cut (break) 2.54mm female pin headers to custom size

40x1 Male Berg Strip (90 Degree) This is a 40x1 Pin male berg strip right angle Male, which has the industry-standard spacing of 2.54mm and is designed for soldering directly into printed circuit boards (PCB). They are supplied Best for the extension of pins of Microcontrollers and ICs. This  40x1 pin berg strip right angle Male is used with custom PCBs or general custom headers. This berg strip connector can be cut into the desired sections. This 40x1 Right angle male connector is an ideal connector for the PCB board and integrated circuit and it is used widely in the computer and breadboard. It has a pitch (distance between two pins) of 2.54. This 40x1pin berg strip Right angle male connector with 2.54mm pitch is an accessory that can be used with any of our LCD , OLED , or VFD modules, as well as any PCB requiring pin headers. The size of the header pins should correspond to the same of the header holes, otherwise, the connection is not tight enough and easy to loosen. It can be cut according to different needle number requirements to achieve the actual number of needles used. Choose the header according to the required number of pins and the pin spacing, and insert it directly into the breadboard to connect or form a connector with the header to achieve the purpose of connection. Key Features: 2.54mm pitch right-angle male connector for PCBs. Ideal for extending microcontroller and IC pins. Compatible with LCD, OLED, or VFD modules. Secure connection with matching header pin sizes. Versatile applications including PCB prototypes and breadboards. Easy through-hole mounting. Durable plastic construction for DC power up to 3A. Applications: Used to connect the PCB prototype and the breadboard The docking of the small board and the breadboard As a through stacking head on the PCB

40x1 Pin 2.54mm Pitch Male Berg Strip This is a 40x1 Pin Male berg strip connector which has the industry-standard spacing of 2.54mm and is designed for soldering directly into printed circuit boards (PCB) . They are supplied Best for the extension of pins of Microcontrollers and ICs. This 40x1 Pin Male berg strip Connector is used with custom PCBs or general custom headers. This connector can be cut into the desired section and this is an ideal connector for the PCB board and integrated circuit used widely in the computer and breadboard . It has a pitch (distance between two pins) of 2.54. This Male berg strip connector with 2.54mm pitch is an accessory that can be used with any of our LCD , OLED , or VFD modules, as well as any PCB requiring pin headers. Applications: Used to connect the PCB prototype and the breadboard The docking of the small board and the breadboard As a through stacking head on the PCB Pin Headers - soldering, cutting, male, female, etc.

40x1 Pin 2.54mm Single Row Straight Male Pin Header Strip (Pack of 50) This Single Row 40 Pin Berg Strip Pack of 50. The 50 Quantity Headers can be used in multiple DIY electronic applications. This Male Berg Strip bundle has pitch size of 2.54 Millimeters which can be easily used with any Standard Circuit Board like Vero Boards, Breadboards. This 40 Pin Male Break Away Header Pack of 50 has the industry standard spacing of 2.54mm and are designed for soldering directly into printed circuit boards (PCB). They are best for extension of pins of Microcontrollers and ICs.

40x1 Pin 2.54mm Straight Female Pin Berg Strip (Pack of 50) This is a 40 Pin single row straight female berg strip 50 Quantity. These 50 Quantity Female header pin comes with universally standard spacing of 2.54 Millimeters. The 40 Pin 2.54mm Pin Headers for PCB boards can be easily used with Arduino Uno, Arduino Shields, Node MCU, and other Circuit boards. High Quality, Gold-Plated Contact, better electrical conductivity and low contact resistance. Generally used in circuit boards and other low-voltage circuits. This pin header is a ideal socket connector for the PCB board and integrated circuit, is used widely in the Vero board and breadboard.