100 RPM Dual Shaft BO Motor-Straight

ULN2003 12V Stepper Motor Driver This 12V DC 28BYJ-48 Stepper Motor is a low-cost, high-quality geared stepper motor. Because of the system's stability and reliability, the 28BYJ-48 Stepper Motor and ULN2003 Stepper Motor Driver is a popular combination of stepper motor and stepper driver. The pack includes the ULN2003 Stepper Motor Driver, which is a Mini Stepper Motor Driver. The main function of the ULN2003 is to amplify the control signals from the Arduino so that they can be used to drive the 28BYJ-48 Stepper Motor. If you want to control the stepper motor with the stepper motor driver, for that you will need a few essential components like Arduino jumper wires batteries or power supply Features: Stepper motor with a standard interface, when used directly pluggable. A, B, C, D four-phase LED indicator which indicates the status of the stepper motor work. Compact-size stepper motor perfect for small robotics applications. Also, read our blog What is Motor Driver detailing an overview of motor drivers, including the different types available and how they work.

28BYJ-48 5V DC Stepper Motor This 5V DC 28BYJ-48 Stepper Motor is small, inexpensive and high-quality geared step motor. The 28BYJ-48 Stepper Motor and ULN2003 Stepper Motor Driver is a widely popular combination of the stepper motor and stepper driver, because of the stability and reliability of the system. The motor has a reduction ratio of 64:1, so it offers a decent torque for its size at speeds of about 15 RPM. It is a unipolar stepper motor which has 5-wires. As stated before the pack contains ULN2003 Stepper motor driver which is a Mini Stepper Motor Driver.The main purpose of ULN2003 is to amplify the control signals from the Arduino, so as to drive the 28BYJ-48 Stepper Motor. If you will give the ULN2003 Stepper motor driver a certain pulse signal, it will drive step motor to a certain angle.The control of Stepper motor movement angle is done by controlling the number of stepper motor driver pulses. The speed of the stepper motor rotation is also controllable by controlling the frequency of the pulses. Connect the 28BYJ-48 motor with the ULN2003 motor driver then interface this combination of motor and driver with Arduino , do some coding and your 28BYJ-48 Stepper Motor is ready to listen to your commands Features: Stepper motor with a standard interface, when used directly pluggable. A, B, C, D four-phase LED indicator which indicates the status of the stepper motor work. Compact-size stepper motor perfect for small robotics applications. Applications: Cameras for providing precise control and positioning. Tilting of car side mirrors can be controlled using these motors. CNC Machines Robotic Arms Home Automation

12V 10A PWM DC Motor Speed Controller The DC Motor Speed Controller allows controlling the direction of a DC motor using a Pulse-Width-Modulated (PWM) DC voltage with a Duty Cycle fully adjustable from 10%-100%. The 12 Volt DC Motor Speed Controller can provide a continuous current of 10A to your DC motor or other DC load. The circuit also includes a 10A fuse, with the reverse connection of the power supply and control voltage over-voltage protection function. This speed regulator uses a barrier terminal block as its wiring type. The output voltage is linear under load and features a control frequency of 13kHz. Note: This cannot be used for the brushless motor. The controller is not reverse-polarity protected and will be damaged if it connects the supply voltage with the wrong polarity. Features: Control the speed of a DC motor with this controller. High efficiency, high torque, low heat generating. With reverse polarity protection, high current protection. Control voltage over-voltage protection function The overload and short circuit protecting current is 10A Applications: Automotive: Controlling the speed of cooling fans, windshield wipers, and air conditioning systems. Industrial Automation: Managing the speed of conveyor belts, exhaust fans, and other motor-driven machinery. Home Appliances: Adjusting the speed of fans, pumps, and other household devices. Treadmills: Regulating the speed of the treadmill belt for different workout intensities. Robotics: Providing precise speed control for DC motors in robotic projects. DIY Projects: Ideal for custom electronics projects requiring variable motor speed control

The DIY Mini Wind Turbine Blade Set is a compact, vertical-axis wind turbine kit designed for educational, experimental, and small-scale renewable energy applications. Ideal for hobbyists, students, and engineers, this micro generator blade set enables hands-on learning about wind energy conversion and sustainable power generation. Each blade is precision-engineered for optimal aerodynamic efficiency at low wind speeds, making it perfect for indoor demonstrations or outdoor micro-generation setups. This set includes lightweight, durable blades compatible with most small DC generators and motors repurposed as generators. The vertical axis design ensures 360-degree wind capture, eliminating the need for yaw mechanisms and allowing operation from any wind direction. It's widely used in STEM education, science fairs, IoT energy harvesting prototypes, and off-grid sensor power systems. Easy to assemble and integrate, the kit supports experimentation with blade pitch, count, and generator coupling. Whether you're building a wind-powered charger, environmental monitoring station, or classroom demo, this turbine blade set offers a practical, low-cost entry into wind energy technology. Available for fast delivery across India.

1200W PWM Motor Speed Controller with Potentiometer This is a simple and easy-to-use DC motor speed controller of small size, elegant appearance, and stable performance. It is made with a high-quality circuit board which ensures a longer service life. The DC Motor Speed Controller allows controlling the direction of a DC motor using a Pulse-Width-Modulated (PWM) DC voltage with a Duty Cycle fully adjustable from 10%-100%. The motor speed controller can provide a continuous current of 8A to your DC motor or other DC load. Speed Regulator is an important electronic DIY equipment. Do not touch the heat sink with the wiring. If it touches, it may burn the circuit board. Note that this is not a power module. It must be connected to the motor to speed it up. There is no change in the output of the multimeter without the motor. Features: Maximum Power: 1200W The speed of the DC motor can be controlled by adjusting the pulse width modulation (PWM). The knob realizes 0-100% adjustment, supports step-less speed regulation, and facilitates positioning speed.

A3967 Stepper Motor Driver This A3967 Stepper Motor Driver For Arduino is the most recent version of EasyDriver v44, which was created in collaboration with Brian Schmalz. When compared to previous versions, it offers more flexibility and control over your stepper motor . It is a simple stepper motor driver that is compatible with most microcontrollers and capable of producing a digital 0 to 5V pulse (0 to 3.3V pulse if you solder SJ2 closed on the EasyDriver). A 7V to 30V power supply is required for the module's motor. The digital interface is powered by an onboard voltage regulator that can be set to 5V or 3.3V. The A3967 is a full-featured microstepping motor driver with an integrated transistor. It is intended for use with bipolar stepper motors in full-, half-, quarter-, and eighth-step modes, with output drive capabilities of 30 V and 750 mA. The A3967 comes with a fixed off-time current regulator that can operate in slow, fast, or mixed current-decay modes. This current-decay control scheme produces less audible motor noise, higher step accuracy, and lower power dissipation. The transistor is essential to the A3967's simple implementation. Simply sending one pulse to the STEP input causes the motor to move one step (full, half, quarter, or eighth depending on two logic inputs). It is not necessary to programme phase-sequence tables, high-frequency control lines, or complex interfaces. The A3967 interface is ideal for applications where a complex P is either unavailable or overburdened. Features: A3967 microstepping driver Adjustable current control from 150mA/phase to 750mA/phase MS1 and MS2 pins are broken out to change microstepping resolution to full, half, quarter and eighth steps (defaults to eighth) Compatible with 4, 6, and 8-wire stepper motors of any voltage Breadboard-compatible pins.

A4988 Stepper Motor Driver Module with Heat Sink For 3D Printer (Red) A4988 Stepper Motor Driver is a complete micro-stepping motor driver with a built-in translator for easy operation. The product can be full, half, 1/4, 1/8, and 1/16 step mode to operate bipolar stepper motor output drive capacity of up to 35 V and ± 2 A. A4988 includes a fixed off-time current regulator, the regulator can slow or mixed decay mode. The converter is the key to the easy implementation of the A4988. In inputting one pulse on the STEP input drives the motor one micros tep. No phase sequence tables, high-frequency control lines, or complex interfaces to programming. A4988 interface is very suitable for complex microprocessor is unavailable or is overburdened. The micro-step operation, the chopping control in the A4988 automatically selects the current decay mode (Slow or Mixed). In the mixed decay mode, the device is initially set to fast decay in the part of the fixed off-time, then a slow decay in the rest of the downtime. Mixed-decay current control scheme results in reduced audible motor noise, increased step accuracy, and reduced power consumption. Internal synchronous rectification control circuitry to improve the pulse-width modulation (PWM) power consumption when operating. Internal circuit protection includes thermal shutdown with hysteresis, under-voltage lockout (UVLO) and crossover current protection. Special power-Sort. If you want to control the stepper motor with this motor driver, you will need a few essential components like Arduino , breadboard, jumper wires, batteries, and power supply. Features: Simple step and direction control interface Five different step resolutions: full-step, half-step, quarter-step, eighth-step, and sixteenth-step Automatic current decay mode detection/choice. Mixed with slow current decay mode Over-temperature thermal shutdown, under-voltage lockout, and crossover-current protection Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated voltage to achieve higher step rates check out : Stepper Motor Driver Expansion Board

Sunny Sky EOLO 15x5.5 inch propellers- A Pair (Straight version) Sunny Sky EOLO 15×5.5 inch propellers are the perfect choice for drone enthusiasts seeking efficiency and durability in their flights. With a size of 15×5.5 inches, these propellers are tailor-made for quadcopters and multi-rotors, offering excellent lift and stability in the air. The propellers are designed to provide an optimal thrust-to-power ratio, ensuring you get the most out of your drone’s motors while also extending your battery life. Constructed from high-quality materials, these propellers can withstand the demands of frequent flights and are resistant to damage. They also contribute to smooth flights by reducing vibrations, resulting in more stable aerial maneuvers. Installing these propellers is a breeze, thanks to their standard mounting holes that fit most drones seamlessly. Upgrade your aerial experience with Sunny Sky EOLO 15×5.5 inch propellers today! Features: 15×5.5 inch size provides an ideal balance of lift and control, making it well-suited for quadcopters and multi-rotor drones, especially for carrying moderate payloads and maintaining stable flight Designed for high efficiency with an optimized thrust-to-power ratio, helping drones achieve better performance while conserving battery and extending flight time Built using high-quality and durable materials that offer excellent strength, ensuring resistance to wear, minor impacts, and long-term usage Precision-engineered blades minimize vibrations during operation, resulting in smoother flights, improved stability, and better control during aerial maneuvers Aerodynamic design enhances airflow and thrust generation, improving overall flight responsiveness and performance Easy to install with standard mounting holes, allowing quick and secure attachment to a wide range of compatible drone motors Provides consistent performance across different flying conditions, making it suitable for both beginners and experienced drone pilots

Holybro PM07 Power Module (14S) The Holybro PM07 Power Module (14S) is a robust and reliable power module designed to deliver clean, regulated power to your drone’s flight controller and onboard electronics, supporting up to 14-cell LiPo battery configurations. Engineered for high-current UAV applications, this module provides accurate real-time voltage and current monitoring, helping ensure safe operation while protecting sensitive components from electrical faults. Its efficient power delivery and dependable performance make it an essential component for advanced drone builds and professional UAV platforms. Built to simplify wiring and enhance system reliability, the Holybro PM07 Power Module integrates seamlessly with popular flight controllers, reducing clutter and improving overall power management. Whether you’re developing high-performance multirotor drones, autonomous platforms, or research UAVs, this power module offers consistent energy supply, precise monitoring, and improved safety for extended flight operations, giving you confidence in both performance and durability. Please Note: The XT60 Plug and 12AWG wire that are pre-soldered on the board is rating for 30A continuous current and 60A burst current (< 60 Seconds). If a higher current is being used, the plug type and wire size should be changed accordingly. You can refer to this chart for reference. This PM02 Power Module uses analog data output and is not compatible to the Pixhawk 5X & 6X (Requires a digital PM like PM02D). Features: High-capacity power module designed to support up to 14S LiPo batteries for advanced UAV applications. Delivers clean and stable power to flight controllers and onboard electronics. Provides accurate real-time voltage and current sensing for improved flight safety. Built for high-current handling in professional and heavy-lift drone platforms. Reduces wiring complexity with an integrated power and monitoring solution. Ideal for multirotor drones, autonomous UAVs, and research-grade aerial systems.

Bambu Lab H2C Combo 3D Printer The Bambu Lab H2C Combo 3D Printer redefines high-performance multi-material 3D printing with precision, speed, and intelligence. Built on advanced Fused Deposition Modeling technology, it features a robust aluminum-steel chassis, fully enclosed chamber, and hardened steel extrusion system capable of handling demanding engineering materials. With support for printing up to seven materials in a single job—without purge waste—the H2C enables complex, integrated designs effortlessly. Its AI-driven monitoring, ultra-fine 50 µm motion accuracy, and automatic calibration ensure consistent, professional-grade results, making it ideal for industrial prototyping, advanced R&D, and professional manufacturing workflows. Purge Saving Multi-Material Printing Using the H2C, it is possible to print as many as seven distinct materials in one pass without needing to purge any nozzles. Merge various material characteristics into a single continuous form and elevate integrated design to an unprecedented level. Integrated TPU Joints for Multi-Color Parts Print durable TPU ball joints for your robot models flexible long-lasting and built for endless motion. Multi-Material Printing With Minimal Purge Waste In conventional single-nozzle multi-material printing, it is necessary to flush out any remnant material when switching filaments. Vortek revolutionizes this process by utilizing a smart hotend-swapping mechanism that substitutes the complete hotend, resulting in quicker, cleaner prints with reduced waste. Fully Automatic Filament Change and Always Delivering the Most Efficient Conversation The Vortek system integrates flawlessly with our dependable AMS (Automatic Material System), enabling the complete automation of the filament replacement procedure, eliminating the necessity for manual loading of each filament into the toolhead. Small Form Factor, More Filaments As only the hotend is exchanged, the setup can accommodate as many as six hotends which are not changeable without greatly decreasing the build capacity. This allows for an increased variety of materials, colors, and options, all within a single print. 8-Second Induction Heating and Contactless Design for Reliability Our top tier induction heating technology heats the nozzle within 8 seconds, greatly minimizing the preheating duration required for changing materials when compared to conventional techniques. Our strict criteria for dependability prompted us to shift from using metal pins that rely on contact, as they are susceptible to oxidation and inconsistent connections. We created a solution without physical contact that guarantees a consistent, high-frequency link, which is essential for accurate temperature management and synchronized intelligent hotend operation. Enclosed for High Performance Printing and Fully Automatic Nozzle Offset Calibration Featuring a continuous enclosure and a flexible air circulation system, the H2C ensures a consistent environment temperature for top quality materials while also purifying the air to create a tidy and secure workspace. Our calibration process for inductive nozzle offset is entirely automated, requiring no manual intervention, calibration plates, or additional setup. Within a matter of minutes, the H2C accurately adjusts the nozzle offset to a tolerance of 25 microns. Dedicated Hotends for Specific Filaments The Vortek system of the H2C allows you to assign one of its six swappable hotends to particular filaments, significantly transforming the use of important engineering substances. This guarantees enhanced reliability and uniformity in printed results. Additionally, each hotend can automatically remember filament data, allowing for an immediate pairing with the appropriate hotend when that same material is loaded again. Smooth Surface, Sharp Edges The H2C utilizes the servo motor within the extruder along with high-resolution eddy current sensors positioned at the nozzle to detect the dynamics of extrusion. This capability allows for accurate control of the extrusion process and the automatic adjustment of Pressure Advance (PA) settings for every filament, leading to smoother surfaces and more defined, sharper edges. Flexible Network Security & Connectivity The H2C provides easy access to cloud connections for controlling the device remotely from any gadget. For applications that require high security, it also offers comprehensive offline capabilities, guaranteeing total physical separation. Users can manage the printer, transfer files, and perform firmware updates without requiring internet access. For those with advanced skills, Developer Mode allows access to the MQTT port, enabling the integration of external components and software. Features: The H2C supports multi material printing for up to 7 different materials, allowing you to produce complex parts in a single run while completely eliminating the need for nozzle purging or creating material waste. The system is equipped with dual hardened steel nozzles capable of reaching 350 °C, which are specifically engineered for long term durability and the processing of high temperature engineering filaments. It features a fully enclosed heated chamber that maintains a steady 65 °C environment to effectively minimize warping and significantly improve layer adhesion for high performance materials. The high force PMSM servo extruder provides up to 10 kg of pushing power, delivering stable and high speed extrusion with 70% more force than traditional stepper motors. By utilizing a vision encoder that automatically compensates for mechanical drift, the printer achieves an ultra precise motion accuracy of 50 µm throughout the entire build. The AI powered print monitoring system uses a network of 59 intelligent sensors and a quad camera vision setup to detect potential printing errors in real time. The H2C features automatic nozzle offset and pressure advance calibration to ensure perfectly smooth surface finishes and consistently sharp edges on every part.

Anycubic Photon P1 3D Printer The Anycubic Photon P1 is an advanced resin 3D printer engineered to deliver near-industrial precision with user-friendly operation. Featuring a high-resolution optical system with over 92% light uniformity, it ensures sharp details, smooth surfaces, and consistent curing across every layer. Its robust mechanical design, including a precision-ground steel build plate and dual-rail Z-axis system, provides exceptional stability and accuracy, making it ideal for professional-grade applications such as prototyping, dental modeling, and intricate design work. Designed for versatility and performance, the Photon P1 supports a wide range of resins, including high-viscosity industrial materials up to 8000 cps. It also introduces advanced technologies such as Wave Release for reduced peel force and a temperature-controlled resin vat for consistent printing even in challenging conditions. With optional dual-material and dual-color printing capability, it enables users to create complex models in a single print, significantly improving workflow efficiency and creative possibilities. Wave Release Technology Wave Release Technology is an advanced innovation designed to significantly improve the reliability and quality of resin 3D printing. It works by optimizing the layer separation process during printing, reducing the peel force required to detach each cured layer from the film. This reduction in force helps prevent common issues such as layer shifting, model deformation, or print failures, especially in complex or delicate designs. Precision-Fitted Industrial-Grade Ball Screw The precision-fitted industrial-grade ball screw enhances the printer’s Z-axis movement by delivering smooth, accurate, and highly stable vertical motion during the printing process. This high-quality component minimizes mechanical backlash and vibrations, ensuring consistent layer alignment and superior print accuracy even for intricate and detailed models. Its robust construction supports long-term durability and reliable performance, making it suitable for continuous industrial use. By maintaining precise positioning throughout each layer, it significantly improves surface finish and overall print quality, especially in high-resolution resin printing applications. Precision-Ground Steel Build Plate The precision-ground steel build plate is engineered to provide a perfectly flat and stable printing surface, ensuring excellent first-layer adhesion and consistent print quality. Its finely machined surface enhances grip for resin prints, reducing the chances of model detachment during the printing process. This high level of flatness and rigidity improves overall accuracy, especially for detailed and high-resolution prints. Built for durability, the steel construction withstands repeated use and maintains its precision over time, making it ideal for professional and industrial applications. Engineered for Ultra-Viscous 8000cps Resin Engineered to handle ultra-viscous resins up to 8000 cps, this feature allows the printer to work efficiently with thicker, high-performance materials that are typically challenging for standard resin printers. It ensures smooth and consistent resin flow, preventing issues like uneven curing or print defects. This capability expands material compatibility, enabling the use of specialized industrial resins for stronger, more durable, and functional prints. As a result, users can achieve higher-quality outputs with improved mechanical properties, making it ideal for advanced engineering, prototyping, and professional applications. Features: High-resolution resin printing with ultra-fine detail Dual-color and dual-material support (optional) LightTurbo 4.0 optical system for uniform curing Wave Release technology for improved reliability Supports high-viscosity industrial resins (up to 8000 cps) Temperature-controlled resin vat for stable performance Intelligent assistant for automated operation Strong and stable mechanical structure Ideal for dental, prototyping, and miniature printing.

Sunny Sky V2806 KV650 Brushless Motors Sunnysky V series of motors are specially designed to power long-endurance multirotor aircraft. Design styles of the whole series are high efficiency, stable structure, lightweight, high consistency, etc. These flat Sunny Sky V2806 motors are designed for long-flight time multi-rotors. These motors can produce enough torque at low RPM and work at peak efficiency during flight. The whole series uses Sunnysky’s patented Stepped and knurled design that not only efficiently prevents motors from getting loose, but also reduces the probability of malfunction and unstable output power. The whole series use original Japanese EZO bearings that provide quiet and stable flight in the air. With the guarantee of strength, the caps of V motors are highly hollow-cutted to save weight, so that these Sunny Sky V2806 motors can reach the maximum thrust-to-weight ratio and gain more flight time. Features: Delivers powerful performance with high output, enabling excellent speed and  agility for RC vehicles Built with high-quality materials and precision engineering for durability and long-lasting use Optimized for efficient operation, helping improve performance while extending flight time Designed for easy installation and compatibility with a wide range of RC setups Suitable for multiple applications including drones, multi-rotors, and fixed-wing aircraft Ensures smooth and stable control for better handling and precise flight maneuvers

VIGOR 9V 200 RPM Dual Shaft Straight Shape BO Motor The VIGOR 9V 200 RPM Dual Shaft BO Motor – Straight Shape is a lightweight, efficient, and affordable geared DC motor designed for high-speed motion in robotics and DIY electronic projects. With its dual-shaft design, this motor allows easy integration of wheels, encoders, and mechanical attachments, giving you more flexibility when building mobile robots or automation prototypes. It operates smoothly within a 3–12V range, offering good torque and a fast 200 RPM output that is ideal for small to medium robotic platforms. Built using durable injection-molded plastic gears, the motor ensures low friction, low noise, and long-lasting performance without requiring lubrication. Its compact body design includes mounting holes for quick installation, making it perfect for 2WD robotic cars, educational kits, and hobby projects. Whether you’re a beginner experimenting with robotics or a maker building a custom prototype, this dual-shaft BO motor offers an excellent balance of performance, efficiency, and value. Features: High-speed 200 RPM dual-shaft motor designed for mobile robotics and DIY systems. Smooth and stable performance across 3–12V operating voltage range. Lightweight plastic gear housing ensures low inertia and quiet operation. Dual-shaft layout supports wheels, pulleys, and encoder attachment for more control. Integrated mounting holes allow easy installation on robot chassis and project enclosures. Shock-absorbing, corrosion-resistant, and low-maintenance design ensures long service life. Low-cost alternative to metal gear motors without compromising functionality. Compatible with 69mm plastic wheels for optimized robot mobility.

7Semi DC Buck Converter Breakout 3.3V 2A Out (AP62301) (BO-10131) The 7Semi DC Buck Converter Breakout 3.3V 2A Out (AP62301) is a compact power module that converts higher DC voltages into a stable 3.3V output with up to 2A current. It accepts a wide range of input voltages, making it useful for powering low-voltage electronics from batteries, adapters, and other DC sources. This makes it ideal for projects that require a reliable 3.3V supply. Built using an efficient synchronous buck converter design, this board delivers dependable power with minimal energy loss and low heat output. The small form factor allows easy integration into your electronics builds, especially space-constrained and portable systems. Whether you’re working on IoT devices, embedded controllers, or sensor systems, this converter provides a simple and efficient power solution for your 3.3V needs. Features: Provides a stable 3.3V output with up to 2A continuous current Accepts a wide DC input voltage range for flexible power sources High-efficiency synchronous buck converter design Low heat generation for efficient and safe power delivery Compact breakout board for easy integration and prototyping Ideal for IoT devices, embedded systems, and battery-powered projects Suitable for powering microcontrollers, sensors, and communication modules

Dual Micro USB 18650 LiPo DIY Power Bank Module (3.7V to 5V, 2A Output) The Dual Micro USB 18650 LiPo DIY Power Bank Module is designed to convert a 3.7V 18650 lithium battery into a stable 5V output with up to 2A current, making it perfect for charging smartphones, IoT devices, and other USB-powered gadgets. At its core, this module functions as a compact power management and boost conversion board, allowing you to build a fully customized portable power bank. It features dual Micro USB ports for convenient charging and integrated LED indicators to display charging and power status. Ideal for DIY enthusiasts, makers, and electronics hobbyists, this board gives you the flexibility to create your own reliable mobile power solution—provided you have basic electronic assembly knowledge. When installing items, it is important to keep the following in mind: Batteries can be connected in parallel with a voltage ranging from 3.2 to 4.2V, including 18650 flat and polymer batteries. We can connect the battery to the motherboard B + negative-, which is installed against the burning motherboard. Batteries that are new and old, or that have contradictory model brands, cannot be mixed. Features: Four-level LED bulb displays power, not working situation intelligent automated shutdown. The built-in lithium battery protection IC, overcurrent, overpressure, and undervoltage protection Dual USB output ports. Input requirements: 5V constant voltage power supply can charge input power, the most matching charger for 5V 1A or above. Requirements for rechargeable batteries: Compatible batteries include 18650 batteries, cell phone batteries, flat-panel batteries, MP3 batteries, and polymer lithium batteries ranging from 3.7V to 4.2V.