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)

Witty Fox 130mAh Rechargeable 3.7V LiPo Battery The Witty Fox 130mAh Rechargeable 3.7V LiPo Battery is a compact and lightweight lithium polymer battery designed for applications requiring a reliable and rechargeable power source. With a nominal voltage of 3.7 volts and a capacity of 130mAh, this 1S battery cell configuration offers a stable and consistent power output suitable for small electronic devices such as drones, wearables, and portable gadgets. It operates efficiently within a temperature range of 0? to 50?, ensuring dependable performance in typical consumer environments. The battery supports up to 500 charge-discharge cycles, providing a durable and long-lasting energy solution for repeated use. It is important to note that not all 3.7V batteries are rechargeable; some are primary batteries intended for single use only. The Witty Fox battery, however, is a rechargeable lithium polymer (LiPo) type, which uses a polymer electrolyte allowing for a flexible and lightweight design. LiPo batteries like this one are favored for their high energy density and customizable form factor, making them ideal for compact devices. Proper charging and maintenance can maximize the battery’s lifespan and performance, making it a practical choice for users seeking a balance of power, size, and longevity in a rechargeable 3.7V battery. Features: Rechargeable lithium polymer (LiPo) battery technology Lightweight and flexible design ideal for portable devices Stable voltage output ensures reliable performance Wide operating temperature range for versatile applications High cycle life enhances durability and cost-effectiveness Suitable for drones, wearables, and other compact gadgets

DFRobot Gravity Analog Current to Voltage Converter (for 4~20mA Application) The Gravity: Analog Current to Voltage Converter is a versatile module designed to bridge the gap between industrial equipment and hobbyist electronics. This current to voltage converter linearly transforms 0-25mA current signals into 0-3V voltage outputs that can be easily read by microcontrollers like Arduino. Industrial sensors and devices typically output 4-20mA current signals, which standard microcontrollers cannot directly interpret. This industrial sensor interface module solves that problem by converting these signals into voltage readings that any analog input pin can process. The module's wide detection range of 0-25mA makes it particularly useful for fault diagnosis (below 4mA) and overrun detection (above 20mA) applications. What makes this 4-20mA signal converter stand out is its combination of high precision and ease of use. The module uses a 0.1% high-precision sense resistor paired with an ultra-low noise rail-to-rail zero-drift operational amplifier, ensuring accurate readings without requiring calibration. With measurement accuracy of ±0.5% at 16-bit ADC resolution, this module delivers reliable data for critical applications. The wide supply voltage range of 3.3V to 5.5V ensures compatibility with various development boards, while the standard Gravity 3-pin interface makes connections simple and straightforward. Whether you're working on Arduino current measurement projects, industrial automation, or sensor integration, this converter provides a reliable bridge between industrial standards and DIY electronics. Features: Supply Voltage: 3.3~5.5V for compatibility with various microcontrollers. Detection Range: 0~25mA DC for comprehensive current monitoring. Measurement Accuracy: ±0.5% F.S. @ 16-bit ADC, ±2% F.S. @ 10-bit ADC. Termination Resistance: 120? for standard current loop applications. Connector Type: PH2.0-3P for easy plug-and-play connection. Product Size: 30mm × 22mm (1.18inch × 0.87inch) compact design. Linear conversion from current to voltage without requiring calibration

1800mAh AA Rechargeable Battery 1.2V Introducing the OSLETECH 1.2V 1800mAh AA Rechargeable Batteries the ultimate choice for long-lasting power and reliability. Designed to be the longest-lasting batteries per charge, these high-performance AA batteries can be recharged hundreds of times which makes it a cost-effective and eco-friendly choice. These batteries deliver impressive energy density and exceptional performance, even across varying temperature conditions. These proudly made in India, OSLETECH’s 1.2V 1800mAh AA Rechargeable Batteries provide both extended lifespan and elevated power and ensure your gadgets stay powered longer.

Bluetooth 5.0 Dual Mode BLE (Feasycom) The Bluetooth 5.0 Dual Mode BLE (Feasycom) is a high-performance, highly integrated Bluetooth 5.0 BR/EDR/BLE dual-mode module. It operates on the 2400MHz to 2480Mhz ISM frequency band and has a low power consumption of 5mA working current. It is also low cost with excellent performance. The module has a built-in PCB antenna and supports an external antenna. It is the best alternative for the Bluetooth HC05 chip as it has been obsoleted. The Bluetooth module supports communicating with the FeasyBlue app and many other Bluetooth apps. The Bluetooth 5.0 Dual Mode BLE (Feasycom) has a number of features that make it ideal for a variety of applications, including: Features: High performance: The module is based on the latest Bluetooth 5.0 standard, which provides significant improvements in range, speed, and power efficiency over previous versions of Bluetooth. Low power consumption: The module has a low power consumption of 5mA working current, which makes it ideal for battery-powered devices. Low cost: The module is low cost, making it an affordable option for a variety of applications. Built-in PCB antenna: The module has a built-in PCB antenna, which makes it easy to use and requires no additional hardware. Supports external antenna: The module supports external antenna, which can be used to improve the range and performance of the module. Communicates with the FeasyBlue app: The module communicates with the FeasyBlue app, which makes it easy to configure and use the module. Supports many other Bluetooth apps: The module supports many other Bluetooth apps, which makes it compatible with a wide range of devices. The Bluetooth 5.0 Dual Mode BLE (Feasycom) is a versatile and powerful module that is ideal for a variety of applications. It is a high-performance, low-power, and low-cost module that is easy to use and supports a wide range of features. Applications: Printer Health Thermometer Heart Rate Blood Pressure Proximity Also check the Mini elm327 Bluetooth OBD2 , it is designed to display real-time engine data on a mobile phone, including RPM, coolant temperature, boost pressure, throttle position, fuel pressure, and mileage.

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

0.9V-5V to 5V 600MA USB Output charger step up Mini DC-DC Boost Converter This Step-up Module is highly beneficial as it allows for an input range of 0.9-5V and an output of 5V, which is compatible with a variety of digital devices. As a result, it is an excellent choice for creating a portable charger and can prove useful in USB charger projects and onboard USB device supply solutions, such as GoPro cameras. Moreover, This boost converter offers versatility in terms of power supply options. It can be powered by a single-cell LiPO or AA size battery, or other similar options. When powered by two AA batteries, it can output a current of 500-600mA. On the other hand, a single AA battery power supply can provide an output of 200 mA current supply, making it ideal for mobile phones, cameras, single-chip, and digital products supply. Applications USB voltage regulator for USB-powered device. This module will bring the USB voltage required for your application at regulated 5V output. Various USB devices need 5V from low voltage batteries. Charge mobile phone/MP4/MP3 from AA battery when traveling Features The module adopts a high-performance imported chip, performance is superior to the common module. Work with indicator light. Take the USB female, a wide range of Uses. A single AA battery power supply can output current up to 200-300 mA. Two AA batteries to the output current of 500-600 mA. Work from battery voltage as low as 0.9V, allowing you to maximize battery use. If your USB device is critical on 5V operation you can use this module.

Raspberry Pi Pico Headers and Micro USB Cable The all-new Raspberry Pi Pico is the latest addition to the Raspberry Pi family of microcontrollers. It is a new flexible microcontroller board that is built on silicon and is designed entirely by Raspberry Pi. The Raspberry Pi Pico board is integrated with all the features for you to get started with whether you choose to use our C/C++ SDK or the official MicroPython port. Raspberry Pi Pico is a low-cost, high-performance microcontroller board with flexible digital interfaces. The Pico board from Raspberry Pi is built with RP2040 microcontroller chip designed by Raspberry Pi. It has a dual-core ARM Cortex M0+ processor, the flexible clock running up to 133 MHz. This Raspberry Pi features 2MB of onboard Flash memory and 264KB of SRAM. There are few handy components those can be helpful while using Raspberry pi pico are breadboards , power supply , switches , jumper wires and display modules . The design of the Raspberry Pi Pico board provides a castellated module that allows soldering direct to carrier boards. It is easy to use and has a user-friendly experience with drag & drop programming using mass storage over USB. Getting Raspberry Pi Pico started with MicroPython Program your Raspberry Pi Pico with the easy to use drag and drop feature. All you need to do is simply connect the Raspberry Pi Pico to a computer via USB, then drag and drop the file onto it. Follow the given steps to get the MicroPython started on your Raspberry Pi Pico: Download the MicroPython UF2 file. Push and hold the BOOTSEL button and plug your Pico into the USB port of your Raspberry Pi or another computer. Release the BOOTSEL button after your Pico is connected to your computer. It will mount as a Mass Storage Device called RPI-RP2. Drag and drop the MicroPython UF2 file onto the RPI-RP2 volume. Your Pico will reboot. You are now running MicroPython. You can access the REPL and MicroPython via USB Serial. How to blink an LED on Raspberry Pi Pico? Blinking an LED is the first program anyone writes on a new microcontroller. The Raspberry Pi Pico comes with a single LED on-board connected to GPIO pin 25. Follow the given steps to get the LED to blink on your Raspberry Pi Pico: Download the Blink UF2 Push and hold the BOOTSEL button and plug your Pico into the USB port of your Raspberry Pi or another computer. It will mount as a Mass Storage Device called RPI-RP2. Drag and drop the Blink UF2 binary onto the RPI-RP2 volume. Pico will reboot, and the onboard LED should start blinking. Visit our Raspberry Pi Displays collection page for official Displays. Note: Iotcart is the authorized sellers of Raspberry Pi products in India. Therefore, even if you are in Bangalore, Hyderabad, Kerala, Mumbai or Pune, you can get Raspberry Pi Pico online from Iotcart at the comfort of your homes.

DFRobot Bluetooth 5.0 Audio Receiver Board The Bluetooth 5.0 Audio Receiver Board is a compact and cost-effective solution for adding wireless capabilities to your existing speakers. This versatile Bluetooth audio receiver allows you to easily transform any old speaker system into a modern wireless setup without complicated wiring or expensive replacements. The module features the latest Bluetooth 5.0 technology, ensuring stable connections and quality audio transmission up to 15 meters in visible range. With its automatic reconnect function, you won't need to repeatedly pair your devices - once connected, the module remembers your device for future use. The board can be powered either through a micro-USB connection or a 3.7V lithium battery, giving you flexibility in how you install and use this wireless speaker converter. What makes this Bluetooth 5.0 adapter particularly valuable is its dual functionality. Beyond serving as a wireless audio receiver, it can also function as a computer sound card. By simply short-circuiting the Sound Card pads on the back of the module and connecting it to a computer via USB cable, you can use it as a USB sound card module - perfect for computers with damaged audio outputs or for adding an extra audio interface. The operation is straightforward: after powering on, the blue indicator flashes as the module enters Bluetooth mode and plays an audio prompt while waiting for pairing. Your phone will detect the module as "BT5.0-Audio," and once connected, the indicator remains solid when idle and blinks slowly during music playback. Features: Power supply options: micro-USB or 3.7V lithium battery for flexible installation. Bluetooth version: 5.0 with automatic reconnect function for stable connections. Transmission distance: 15 meters in visible range for wide coverage. Audio decoding support: WAV, APE, FLAC, and MP3 formats. Dual functionality: works as both Bluetooth receiver and computer sound card. Clear connection status indication through LED light patterns. Compact size for easy integration into existing audio systems.

Flash 4S 30A 148V Li-Ion Lithium 18650 Battery Protection Board The Flash 4S 30A 148V Li-Ion Lithium 18650 Battery Protection Board is a high-performance protection board designed for 4S lithium iron phosphate batteries. With a continuous discharge current of up to 30A and an instantaneous discharge of 56A, this board ensures safe and efficient operation of your battery system. It features a built-in balance circuit that maintains voltage stability and prolongs battery life. This compact protection board comes with an integrated cable for easy setup, supporting fast charging up to 20A with a charging voltage of 14.8V. Additionally, the board operates within a wide temperature range from -30°C to +80°C, making it suitable for various applications.

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)

1000mAh AAA Rechargeable Battery 1.2V (Pack of 2) The OSLETECH AAA Rechargeable Batteries combine efficiency, effectiveness, and environmental friendliness in the ideal balance. This pair of globally recognized and broadly compatible Ni-Mh batteries are fully charged and ready to use right out of the package. Boasting an industry-leading 1000mAh capacity, these batteries offer over 500 charge cycles and feature a no-memory effect, allowing them to be charged and discharged as needed without losing capacity. These batteries also support quick charging via any smart or quick charger. These OSLETECH 1000mAh Rechargeable AAA Batteries are also designed for Rechargeable and reusable with the environment in mind. These batteries are made in India products and the smart choice for sustainable energy. Key Features: Cost-effective with many recharge cycles. NiMH chemistry for balanced performance. Fits various devices. Available in different mAh ratings. Rated at 1.2 volts for broad compatibility. Charging time varies by charger. Applications: Remote controls Digital cameras Wireless computer accessories Compact flashlights Portable audio devices Toys Clocks Calculators Handheld gaming devices Medical devices

TP4056 Li-ion Battery Charging Module The TP4056 1A Li-Ion Lithium Battery Charging Module – Mini B USB, a compact solution for efficient charging. This module, with its Mini USB interface, offers hassle-free connection to a computer's USB port for battery charging. For non-USB sources, the IN+/IN- pads provide an alternative, making it perfect for DIY enthusiasts. The smart charging indicators, blue for charging and red for a full charge, ensure you stay informed. With adaptable charging current, advanced technology, and a compact design, this module is a versatile choice for various applications. Made for efficiency, the TP4056 is your go-to solution for reliable battery charging. The TP4056 guarantees the highest quality and durability. Its advanced technology, featuring the TP4056 charging chip, ensures protection and precise charging. The module's adaptability in charging current, ranging from 100mA to 1000mA, provides flexibility for different needs. Whether you're in need of a compact charging solution for your DIY projects or looking for reliable battery charging for various applications, the TP4056 has you covered. Suitable for a wide age range, it comes in a convenient size and color/size variations to fit your specific needs. Features: Charging indicator: RED LED charging, BLUE LED full Charged Charge Current: 1A (default), modify the onboard resistor to adjust the charging current according to the table below. Use mature charging chip TP4056 for simple peripheral circuits, good protection performance, and high charging accuracy. Fully machinery automated processing, all patch parts manufacturing. Charging current can be adjusted by just changing the circuit board’s fixed resistors. It can change the output to the 100mA-1000mA, very conveniently. Applications: DIY Projects: The TP4056 Li-ion Battery Charging Module is ideal for DIY enthusiasts working on various projects, thanks to its versatile Mini USB interface and IN+/IN- pads for non-USB sources. Battery Charging: Specifically designed for efficient and reliable charging of 3.7V lithium batteries, ensuring a full charge at 4.2V with 1.5% accuracy. Adaptable Charge Current: The module allows users to modify the onboard resistor, enabling adjustment of the charging current from 100mA to 1000mA, offering flexibility for different charging needs. Suitable for Various Applications: Whether used in robotics, Arduino projects, or other electronic applications, the TP4056 is a reliable choice for charging lithium batteries.

NOVEL Li-ion Single Battery Charger Plug in Type NOVEL Li-ion Single Battery Charger, a reliable and efficient solution for powering your lithium-ion batteries. Designed with convenience in mind, this plug-in charger offers a straightforward charging experience. Its compact design ensures easy portability, making it an ideal choice for both home and travel use. Crafted from durable plastic, the NVL-006 charger is built to withstand everyday wear and tear. With an output voltage of 9V, it provides the necessary power to charge your batteries effectively. Whether you're at home or on the go, this charger ensures your devices stay powered and ready for use.

Witty Fox 2000mAh Rechargeable 3.7v LiPo Battery The Witty Fox 2000mAh Rechargeable 3.7V LiPo Battery is a high-quality lithium polymer battery designed for a wide range of portable electronic applications, DIY electronics, RC hobbies, and embedded systems. With a nominal voltage of 3.7V and capacity of 2000mAh, this 1S battery provides a reliable power source with a compact footprint. Its rechargeable nature and lightweight design make it ideal for projects requiring high energy density, stable performance, and extended battery life. Whether you're building a custom IoT device, powering a wearable, or running a robotics kit, this battery delivers consistent power and dependable performance. As for usage duration, the lifespan of a 2000mAh LiPo battery largely depends on the power consumption of the connected device. In general, it can last anywhere from 2 to 10 hours depending on how much current the device draws during operation. For instance, if your device consumes around 500mA of current, you can expect the battery to last approximately 4 hours. The Witty Fox battery is engineered to support multiple charge cycles while maintaining efficiency, making it a solid choice for users looking for a dependable and reusable power solution. Features: Single-cell configuration It is rechargeable and can handle several charge cycles. Compact Size: Easily incorporated into portable constructions or tiny enclosures Effective power supply for longer runtime is provided by high energy density. Maintaining a constant voltage under a range of loads is known as stable output. Friendly to Applications: Suitable for a variety of robotics, IoT, and RC projects