Raspberry Pi Compute Module 4 with 2GB RAM, 8GB eMMC

Official Raspberry Pi 4 Model B 4GB RAM The Raspberry Pi 4 Model B 4GB is a compact and versatile single-board computer that provides desktop-level performance in a credit card-sized device. The RPI 4B is powered by a Broadcom Quad-Core Cortex-A72 (ARM v8) 64-bit SoC that runs at 1.5GHz and has 4GB of LPDDR4-3200 SDRAM for efficient multitasking and basic desktop programs. This device is designed for a wide range of DIY projects, including media centres, file servers, robotics, and smart home systems. The Raspberry Pi 4B 4GB supports dual 4K displays ( 4K@30Hz ) through its micro-HDMI ports, making it perfect for high-definition video and creative endeavours. It has dual-band WiFi 2.4 GHz and 5.0 GHz IEEE 802.11ac , Bluetooth 5.0 , and Gigabit Ethernet for a consistent connection. It also features two USB 3.0 connections and two USB 2.0 ports to connect devices. The Raspberry Pi 4 4GB is popular among programmers and makers. It comes with native Python support , making it a fantastic platform for coding education and automation project development. It is capable of running both 32-bit and 64-bit operating systems , offering versatility for different uses. Whether for teaching, prototyping, or creative projects, it serves as a potent and affordable computing option. Shop Raspberry Pi 4 4GB Full Kit – Plug & Play Setup Affordable power for your projects – Raspberry Pi 4 2GB ! What makes this model Great? The speed and performance of the new Raspberry Pi 4 4GB are a noticeable improvement from earlier models. For the first time, the Raspberry Pi Foundation has created a complete desktop experience. Whether you're editing documents, browsing the web with multiple tabs open, managing spreadsheets, or creating a presentation, you'll find the experience smooth and familiar. It is a more energy-efficient and cost-effective machine. Features Broadcom 2711 Quad-Core Cortex A72 @ 1.5GHz delivers 20% faster performance with improved power and thermal efficiency. Dual micro-HDMI outputs support dual 4K displays with hardware video decode at 4Kp60 (H.265, H.264, MPEG-4). Dual-band WiFi (802.11b/g/n/ac) on 2.4GHz & 5GHz with advanced PCB antenna for robust wireless connectivity. Bluetooth 5.0 offers an extended range of wireless peripherals. Upgraded USB 3.0 Ethernet provides wired speeds up to 10x faster than previous models. 2 USB 3.0 and 2 USB 2.0 ports enable versatile peripheral connections. 40-pin GPIO header is fully backwards-compatible with earlier Pi models. Optional PoE support is available, with PoE header pins designed to work with proper standoffs. Comparison Table Raspberry Pi 4 Model B Raspberry Pi 5 Raspberry Pi 3 Model B+ Price (INR) ?3599 VIEW ?5129 VIEW ?3649 VIEW Processor 1.5GHz Quad-Core ARM Cortex-A72 2.4GHz Quad-Core ARM Cortex-A76 1.4GHz Quad-Core ARM Cortex-A53 RAM 1GB, 2GB, 4GB, 8GB LPDDR4 2GB, 4GB, 8GB, 16GB LPDDR4 1GB LPDDR2 Wi-Fi Dual-band 802.11ac Dual-band 802.11ac Dual-band 802.11ac Bluetooth 5.0 5.0 4.2 USB Ports 2× USB 3.0, 2× USB 2.0 2× USB 3.0, 1× USB 2.0 4× USB 2.0 Ethernet Gigabit Ethernet Gigabit Ethernet Gigabit Ethernet Video Output 2× Micro HDMI (4Kp60) 2× Micro HDMI (4Kp60) 1× HDMI (1080p) GPIO Pins 40 40 40 Storage MicroSD (SDXC up to 2TB) MicroSD (SDXC up to 2TB) MicroSD (SDHC) Power Supply USB-C USB-C Micro USB Click for Complete Raspberry Pi Kits – Learn, Build, and Innovate! Pin Diagram:

Maker pHAT for Raspberry Pi – Headless Setup, GPIO Debugging & Built-In I/O The Maker pHAT for Raspberry Pi is designed to make electronics, coding, and headless setup dramatically easier for beginners, educators, and STEM learners. With built-in USB-to-UART, onboard LEDs, push buttons, and an active buzzer, this Raspberry Pi HAT simplifies GPIO debugging, troubleshooting, and prototyping. It eliminates the need for extra components, messy wiring, or a monitor-keyboard setup - making it perfect for classrooms, DIY projects, and Raspberry Pi learning environments. Maker pHAT fits perfectly on Raspberry Pi Zero and works seamlessly with Raspberry Pi 3B/3B+/4B models using the included stacking header. It provides labeled GPIO pins for easy connection, LED indicators for real-time feedback, and push-button support for proper system shutdown. Whether you are exploring electronics, teaching students, or building quick prototypes, Maker pHAT delivers a smoother, faster, and frustration-free Raspberry Pi learning experience. Features: Designed in Raspberry Pi Zero size, stacking perfectly on Pi Zero / Zero W / Zero WH and fully compatible with Raspberry Pi 3B/3B+/3A+/4B series. Supports headless setup easily via onboard USB-to-UART (Rev1.10 uses FT231X), removing the need for monitor, keyboard, or mouse. Equipped with LED indicators for key GPIO pins (GPIO 17, 18, 27, 22, 25, 12, 13, 19) to simplify GPIO learning and debugging. Features 3 programmable push buttons (GPIO 21, 19, 20) for input learning and safe shutdown functionality. Includes active buzzer on GPIO 26 for audio output in projects and coding exercises. Comes with clearly labeled GPIO footprint, including SPI, UART, I2C, 5V, 3.3V & GND for easier wiring and prototyping. Powered via USB Micro-B 5V input from laptop, USB adapter, or power bank. Built using a Purple PCB, making it visually attractive for classroom and DIY setups.

Official Raspberry Pi 5 Model B 1GB RAM The Official Raspberry Pi 5 Model B with 1GB RAM represents a major leap forward in single-board computing performance. Powered by a 2.4GHz 64-bit quad-core Arm Cortex-A76 processor, it delivers up to 2–3× the CPU performance of the previous generation, making multitasking, programming, media handling, and edge computing smoother than ever. With an 800MHz VideoCore VII GPU, the Pi 5 offers significantly improved graphics capabilities and supports dual 4Kp60 display output for high-resolution applications. The redesigned Image Signal Processor enhances camera performance, making it suitable for AI vision projects, surveillance systems, and advanced imaging solutions. Whether you're building a smart device, automation system, media center, or industrial controller, this latest generation Raspberry Pi 5 provides a seamless and powerful desktop-class experience in a compact form factor. Features: Processor: Quad-Core 64-bit Arm Cortex-A76 @ 2.4GHz RAM: 1GB LPDDR4X GPU: VideoCore VII @ 800MHz Display Support: Dual micro-HDMI, up to 4Kp60 each Core Function: High-performance single-board computer for embedded systems, IoT, automation, AI edge computing, and desktop applications Performance Boost: 2–3× faster CPU than Raspberry Pi 4 Camera Support: Improved ISP for advanced image processing

Cytron CM4 Maker Board for Raspberry Pi The Cytron CM4 Maker Board is a powerful and reliable development board built around the Raspberry Pi Compute Module 4 (CM4), designed specifically for Pro Makers, hardware hobbyists, educators, and embedded developers. With its wide input voltage range, convenient power button, and multiple boot options - including microSD, NVMe SSD, and CM4 eMMC, this Cytron board gives makers complete flexibility in how they build, experiment, and deploy their Raspberry Pi projects. It also retains essential interfaces like Gigabit Ethernet, USB 2.0 ports, HDMI, CSI, and DSI, ensuring compatibility with Raspberry Pi HATs and common accessories. Cytron enhances the standard CM4 experience by adding practical maker-friendly features such as on-board RTC (PCF85063A), Grove ports, Maker Port, 10 GPIO status LEDs, a piezo buzzer with mute switch, and dedicated push buttons. Whether you are creating IoT prototypes, robotics systems, dashboards, or long-running automation projects, the Cytron CM4 Maker Board offers stability, bigger storage options, real-time clock capability, and the expandability required for advanced Raspberry Pi development. Features: The Cytron CM4 Maker Board supports a wide input voltage range through a 7–18V DC jack or 5V USB-C, making it adaptable for various maker setups. Cytron includes a convenient hardware power button, allowing safe shutdown and easy startup without needing terminal commands. The board supports multiple boot sources, including microSD, NVMe SSD (2230/2242), and onboard eMMC on CM4 for faster and more reliable storage. Includes all essential Raspberry Pi features like Gigabit Ethernet, 4× USB 2.0 ports, HDMI, CSI camera port, DSI display port, and 3.5mm audio out. Equipped with PCF85063A RTC, enabling real-time clock functionality even without an internet connection. Cytron adds maker-focused extras such as Grove ports, Maker Port, 10 GPIO LEDs, piezo buzzer, and push buttons for quick prototyping. Pinout Diagram:

Official Raspberry Pi 45W USB-C Power Adapter The Official Raspberry Pi 45W USB-C Power Adapter is the ultimate raspberry pi power supply for ensuring stable and efficient performance of your Raspberry Pi 5 and other USB-C compatible devices. Featuring USB Power Delivery (PD) support, it intelligently negotiates voltage and current levels, allowing the Raspberry Pi to power high-demand accessories like SSDs without compromise. With five built-in PD profiles ranging from 5.1V to 20V, this raspberry pi power adapter also doubles as a versatile charging solution for laptops, tablets, and smartphones.The included 1.5m 17AWG USB-C power adapter cable ensures optimal power transfer with minimal loss. Designed with precision and reliability in mind, it’s a must-have for makers, developers, and tech enthusiasts seeking dependable performance in their Raspberry Pi setups. Features 45W Output Power - Delivers dependable, high-power output for the Raspberry Pi 5 and other USB-C devices. Supports USB PD (Power Delivery) : automatically adjusts output based on device requirements. Optimised for Raspberry Pi 5 - Provides consistent 5V/5A power to ensure full performance. Multiple Voltage Profiles - Supports 5V, 9V, 12V, and 15V output for increased compatibility. High-Quality Build - An official Raspberry Pi product built for safety and efficiency Integrated USB-C connector - Plug and play with contemporary Raspberry Pi boards and accessories. Reliable and Safe : Built-in protection against overvoltage, overcurrent, and short circuits. The universal input voltage (100-240V AC) makes it appropriate for worldwide use.

Official Raspberry Pi 500+ SC1237 – Premium Desktop PC (US Layout) The Official Raspberry Pi 500+ SC1237 – Premium Desktop PC (US Layout) is a powerful and human-centered computing solution that blends performance with simplicity. Built on the advanced architecture of the Raspberry Pi 5, this all-in-one desktop integrates a high-quality mechanical RGB keyboard with a US layout, making it perfect for long coding sessions and everyday productivity. With 16GB LPDDR4X RAM, it handles multitasking effortlessly, while the 256GB SSD preloaded with Raspberry Pi OS ensures fast boot times, responsive performance, and plenty of storage right out of the box. Designed for students, developers, and professionals alike, this premium Raspberry Pi desktop PC offers dual USB 3.0 ports, HDMI output, and a compact footprint—delivering a seamless computing experience for programming, media consumption, and creative projects in one sleek device. Features: Successor of Raspberry Pi 500 and 400 series Powered on the Raspberry Pi 5 platform 16GB LPDDR4X-4267 SDRAM allows for smooth multitasking. Preloaded 256GB SSD with the Raspberry Pi OS. Integrated mechanical RGB keyboard design. Dual USB 3.0 ports for fast connectivity. HDMI outputs for dual display support. A compact, all-in-one desktop solution

Cytron Maker Pi RP2040 – Robotics Controller Board with Raspberry Pi The Cytron Maker Pi RP2040 is a compact, beginner-friendly robotics controller board powered by the Raspberry Pi RP2040 microcontroller. Designed for DIY robotics, automation, and motion-control projects, this board integrates a dual-channel DC motor driver, four servo ports, and seven Grove connectors - giving makers everything they need to build robots without complex wiring. With compatibility across CircuitPython, MicroPython, C/C++, and even the Arduino ecosystem, this board ranks among the best RP2040 robotics controllers for students, hobbyists, and educators. Built for convenience, the Maker Pi RP2040 supports multiple power input options (USB, LiPo battery, or VIN), includes onboard functional test buttons, and features status LEDs for easy debugging. The preloaded demo code lets you start controlling motors, playing melodies, and testing GPIOs right out of the box. Whether you are exploring Raspberry Pi’s RP2040 ecosystem or building an advanced robot, the Cytron Maker Pi RP2040 robot controller offers exceptional versatility, ease of use, and reliable motor-driving performance. Features: Powered by the Raspberry Pi RP2040 dual-core Arm Cortex-M0+ processor. Includes dual-channel DC motor driver and four servo motor ports for robotics. Seven Grove ports support digital, analog, I2C, SPI, and UART expansion. Preloaded with CircuitPython for easy plug-and-play coding. Supports USB 5V, LiPo 1-cell battery, or 3.6–6V VIN input with automatic switching. Built-in LiPo charging circuit with safety protections. Onboard piezo buzzer, RGB LEDs, GPIO test LEDs, and push buttons. Quick-test buttons and motor output LEDs for immediate motor testing. Fully compatible with the Raspberry Pi Pico ecosystem, MicroPython, C/C++, and Arduino cores. Includes LEGO-compatible mounting holes and M3 mounting points. Board Layout: Dimension:

SmartElex 10D DC Motor Driver HAT for Raspberry Pi | PWM Driver HAT with PWM Speed Control The SmartElex 10D DC Motor Driver HAT is a compact and reliable expansion board designed specifically for Raspberry Pi to control DC motors with precise speed control. It helps users drive motors directly from the Raspberry Pi without complex wiring or external driver circuits, making motor control simpler and safer. This HAT is ideal for students, makers, educators, and engineers who are building robotics or motion-based projects and want a clean, plug-and-play solution. This motor driver HAT is widely used in robotics, automation systems, and prototyping projects where smooth and controlled motor operation is required. With PWM-based speed control and seamless Raspberry Pi compatibility, it allows easy integration into existing projects and code setups. The stable performance and straightforward design make it suitable for classroom learning, DIY robotics, and early-stage product development where reliable motor control is essential. Hardware Overview Features: Designed specifically as a motor driver HAT for Raspberry Pi PWM-based speed control for smooth motor operation Supports both single-signal and dual-signal motor control modes Simple plug-and-play installation on Raspberry Pi GPIO header Ideal for robotics, automation, and motion control projects Reliable performance suitable for education, prototyping, and DIY builds How to Use The SmartElex 10D DC Motor Driver HAT can be controlled in two different ways depending on your project requirements. Using Two Control Signals (Speed and Direction) In this mode, two separate control signals are used. The PWM signal is applied to the PWM pin to control the motor speed, while the DIR pin is used to control the motor direction. This method offers straightforward and precise control, making it ideal for most robotics and automation applications. Using One Control Signal (Combined Speed and Direction) In this mode, only one control signal is required. The PWM pin is connected to a logic high level, and the DIR pin receives the PWM signal. When the PWM duty cycle is 50%, the motor stops. If the duty cycle is below 50%, the motor rotates in one direction, and if it is above 50%, the motor rotates in the opposite direction. The actual rotation direction depends on the motor wiring

Raspberry Pi USB 3.0 128GB Flash Drive for Raspberry Pi Computers The Raspberry Pi USB 3.0 128GB Flash Drive is a compact and reliable storage solution designed specifically for Raspberry Pi computers. With a generous 128GB capacity, it provides ample space for operating systems, project files, software libraries, and backups. The USB 3.0 interface ensures fast data transfer speeds for quicker boot times and smooth performance, while remaining fully compatible with USB 2.0 ports. Built with a durable metal body, this lightweight flash drive is easy to carry and can be attached to a keyring or lanyard, making it perfect for students, developers, and makers who need portable, high-quality storage for their Raspberry Pi projects. Features: USB 3.0 High-Speed Performance – Delivers strong random and sequential I/O performance for faster read and write operations. Optimized for Raspberry Pi – Designed to work seamlessly with Raspberry Pi and other compatible devices. Compact & Portable Design – Sleek form factor makes it easy to carry and use anywhere. Reliable Power Efficiency – Moderate power consumption ensures stable operation. Power-Loss Resilience – Enhanced protection against unexpected power interruptions. Versatile Usage – Ideal for storing, transferring, and backing up data. Boot & OS Ready – Suitable for installing and running operating systems directly from the drive.

Waveshare UGV Rover ROS 2 Open-source 6 Wheels 4WD AI Robot Suitable for Raspberry Pi 4B / Raspberry Pi 5 Dual controllers, All-metal Body, Flexible and Expandable The UGV Rover ROS 2 Open-source 6-Wheel 4WD AI Robot is a robust, all-metal mobile robotics platform designed for versatile development and real-world navigation. Featuring dual controllers, a flexible and expandable chassis, and seamless ROS 2 integration, it delivers reliable performance for autonomous tasks and intelligent robotics projects. Compatible with Raspberry Pi 4B and Raspberry Pi 5, this rover is perfect for learners, innovators, and developers looking to build advanced AI robotics systems with powerful hardware and modular expandability. Features Supports Pan-Tilt drag-and-drop control via mouse or touch panel of the laptop, providing a better control experience as FPS games Based on Raspberry Pi Designed to support both Raspberry Pi 5 and Raspberry Pi 4B, this robot leverages the strong computing capabilities of the Pi ecosystem to handle more complex tasks with ease. Its expandable architecture unlocks more possibilities for AI, automation, and ROS 2 development. Advanced AI Recognition & Tracking Based on OpenCV, supports color recognition and automatic targeting with one-key Pan-Tilt control and auto LED lighting. Expandable for additional AI functions. Face Detection & Recognition Automatically captures photos or records videos when a face is detected, providing enhanced security and AI interaction. Cross-Platform Web Control No app installation required! Simply connect via a web browser on mobile, tablet, or PC. Supports WASD keyboard shortcuts and mouse control for seamless navigation. WebRTC real-time video transmission Adopts Flask lightweight web application, based on WebRTC ultra-low latency real-time transmission, using Python language and easy to extend, working seamlessly with OpenCV Features at a glance Multiple Autonomous Navigation Modes UGV Rover supports multiple autonomous navigation modes, allowing it to navigate complex environments with precision. Whether following predefined paths, avoiding obstacles, or performing AI-assisted route planning, the robot adapts intelligently to real-world terrains.

TP4056 Battery Charger C Type Module with Protection The TP4056 1A Li-Ion Battery Charging Board Type C with Current safety is a small module designed for charging single-cell 3.7V lithium-ion batteries, such as 16550s, that do not have their own safety circuit. Using the TP4056 charger IC and the DW01 battery protection IC, this lithium battery charger produces a 1A charging current and will automatically stop charging once completed. Also, if the battery voltage goes below 2.4V, the safety IC will cut off the load to save the cell from functioning at an unacceptably low voltage. The TP4056 charging module also protects against overvoltage and reverse polarity connections, often sacrificing itself to preserve the battery. Just remember to double-check your connections the first time you put it up. Your batteries can be safely and easily charged with TP4056 lithium-ion battery charger. All you need to do is connect it correctly, and it will do the rest. Use the Module Through the Following Steps: To supply power, either plug in a Type C cable or attach a 5V DC source to the IN+ and IN-labeled pads on the module's left side. Fasten the battery that has to be charged to the B+/B- pads on the module's right side. The OUT+/OUT- pads on the right side can also be used to attach a load, or an object that the battery will power. Keep in mind that while the battery is charging, unplug the load. When the charging process is finished, the green LED will turn on, while the red LED will illuminate to signify that the charge is ongoing. Be careful to never charge your battery at a rate exceeding 1C Note: Please remember the following crucial information: The module's 5V input side is the only one to which the ampere meter should be attached. A charging current of around 37% of the battery's capacity is advised. A 400mAh charging current is adequate for a 1000mAh battery. Make use of reasonably thin connecting cables. Verify the security of the connecting point. It is usual for the current to decrease below 1000mA if the input voltage is greater than 5.2V. In order to shield the chip from harm, this protective function immediately lowers the charging current. Reverse polarity should be avoided at all costs. Features It features a modern USB Type-C port that provides convenient and universal power. This module includes integrated protection against over-charge, over-discharge, and short-circuits. It utilizes an intelligent CC/CV algorithm to ensure a fast, safe, and efficient charging cycle. It is equipped with clear dual-LED indicators for at-a-glance monitoring of the charging status. This module is perfectly designed for charging single-cell 3.7V Li-Ion and Li-Po batteries. Its compact and high-precision design allows for seamless integration into any electronics project.

Mornsun LMF75-23B15 AC/DC 75W Enclosed Switching Power Supply The LMF75-23B15 is a 75W enclosed AC-DC switching power supply from Mornsun. It features a universal AC input voltage of 85-305VAC or DC input voltage of 120-430VDC, built-in active PFC function, high efficiency, and high reliability. It also has output short circuit, over-current, over-voltage, and over-temperature protection. The LMF75-23B15 is designed to meet IEC/EN/UL62368, EN60335, GB4943 standards and is widely used in areas of industrial, LED, street light control, electricity, security, telecommunications, smart home, etc. Features: Universal AC input voltage of 85-305VAC or DC input voltage of 120-430VDC Built-in active PFC function High efficiency (up to 87%) High reliability Output short circuit, over-current, over-voltage, and over-temperature protection Designed to meet IEC/EN/UL62368, EN60335, GB4943 standards Widely used in areas of industrial, LED, street light control, electricity, security, telecommunications, smart home, etc. check out : Mornsun LMF75-23B05 AC/DC 75W Enclosed Switching Power Supply Note: Unless otherwise specified, parameters in this datasheet were measured under the conditions of Ta=25?, humidity<75%RH with nominal input voltage and rated output load The room temperature derating of 5?/1000m is needed for operating altitude greater than 2000m All index testing methods in this datasheet are based on our company's corporate standards In order to improve the efficiency at high input voltage, there will be audible noise generated, but it does not affect product performance and reliability The out case needs to be connected to the earth ( )of system when the terminal equipment in operating The output voltage can be adjusted by the ADJ, clockwise to increase Our products shall be classified according to ISO14001 and related environmental laws and regulations and shall be handled by qualified units The power supply is considered a component which will be installed into the final equipment. All EMC tests should be confirmed with the final equipment

Raspberry Pi Official Micro-HDMI to Standard HDMI Cable (1 Meter) This is the Raspberry Pi Official Micro-HDMI to Standard HDMI Cable, this cable will connect your Raspberry Pi 4 with any External devices which support up to a 4K resolution and high-speed data transmission. This RoHS-compliant Micro-HDMI to HDMI cable allows you to transfer movies, photos, and videos from devices like smartphones, digital cameras, and video cameras with micro-HDMI connectors to view on your standard HDMI (type-A) television, projector, or computer monitor. It has nice molded grips for easy installation,  Nickel plated connectors, and Mylar-foil shielding for high-speed data transmission. The official Raspberry Pi Micro-HDMI to HDMI cable is reinforced with quad-layer braided shielding and mylar-foil shielding that provides utmost protection against RF and EM interference. Note: Iotcart is the authorized seller of Raspberry Pi products in India. Therefore even if you are in Bangalore, Hyderabad, Kerala, Mumbai, or Pune, you can buy Raspberry Pi official micro-HDMI cables online from Iotcart in the comfort of your home.

18650 1 Cell Holder This is a 1x battery cell holder for a rechargeable 18650 Lithium-Ion Cell. These battery holders are used to add single lithium cells and have clearly marked with polarity identification to assure proper orientation. It has shrapnel screens to hold the batteries, making the installation and replacement of the battery safe, easy, and reliable. Features Holds a single 18650 battery. Easy install, convenient to use. High-quality plastic material. Applications: Robotics: The 18650 Single Battery Cell Case Holder allows for easy incorporation of 18650 cells into robotics applications by providing a simple way to connect and power devices Prototyping: It is ideal for prototyping projects where a single 18650 Lithium-Ion Cell needs to be securely held and connected, ensuring proper orientation and easy installation DIY Electronics: Commonly used in do-it-yourself electronics projects, the holder facilitates experimentation and modification of circuits by providing a flexible and removable power source Automotive Electronics: In automotive applications, such as key fobs and portable navigation devices, the cell holder enables convenient battery replacement, ensuring uninterrupted operation of electronic components

3.7v 2000mah 18650 Li-Ion Battery 18650 lithium-ion battery is a Li-ion rechargeable battery with a 2000 mAh Battery Capacity. This is not a standard AA or AAA battery but is very useful for applications that require continuous high current or high current in short bursts like in cameras, DVD players, iPod, etc. These 3.7v 18650 li-ion battery 2000mah are safe to use, environment friendly and have long battery life. This li ion battery comes with high energy density and provides excellent continuous power sources to your device. It should be used with a protection circuit board that guards the 18650 battery against over-charge, over-discharge of the pack, and avoid over-current drawn. It is very easy to use the cell in any circuit just solder the wires on the terminals or use 18650 li-ion battery holders to easily replace the used cells. Care must be taken while handling Li-ion batteries as they are volatile and inflammable and should not be handled roughly and punctured. Also, don’t overcharge and discharge beyond a certain point as gases accumulated inside might result in explosions and fire. So always use the Protection board while using Li-Ion cells. Note: We do not recommend using this 3.7v 18650 lithium ion rechargeable battery for critical applications. The capacity and performance of the cell might vary based on charging and discharging parameters. Please note that we do NOT provide any guarantee/warranty on this product. Read our blog about Battery AH means , It covers all the details of batteries. Features: Safe to use, environment-friendly, and with long battery life High energy density for excellent continuous power sources Use with a protection circuit board to guard against over-charge, over-discharge, and over-current Easy to use in any circuit by soldering wires on the terminals or using battery holders Applications: Cordless Phones Tablet PC GPS iPod, DVD, MP4 Player, etc. Mobiles backup power supply/Power bank