Witty Fox Rechargeable 350mAh 3.7V Lithium Polymer Battery The Witty Fox Rechargeable 350mAh 3.7V Lithium Polymer Battery is a compact and reliable power source designed for a wide range of portable electronic projects. With a nominal voltage of 3.7V and a capacity of 350mAh, this single-cell (1S) LiPo battery offers an impressive balance between size, weight, and energy output. Its lightweight form factor and high energy density make it an ideal choice for applications such as wearables, IoT devices, small robotics, and wireless modules where space and efficiency are critical. So, is a 3.7V battery good? Absolutely. One of the key strengths of a 3.7V lithium polymer battery lies in its high energy-to-weight ratio, which allows it to deliver significant power without adding bulk. This is particularly beneficial in scenarios where minimizing weight is essential—like in drones, handheld gadgets, and other battery-powered electronics. The Witty Fox 350mAh battery combines rechargeability, compactness, and consistent performance, making it a practical and efficient power solution for both hobbyists and professionals. Features: Single-cell configuration Excellent for reducing device weight because to its high energy-to-weight ratio Rechargeable: Consistent production over a long cycle Space-constrained applications can easily include compact and lightweight devices. Supports a variety of wearable and embedded electronics, making it widely compatible.

Witty Fox Rechargeable 500mAh 3.7V Lithium Polymer Battery The Witty Fox Rechargeable 500mAh 3.7V Lithium Polymer Battery is a compact and efficient power solution, ideal for small electronics, DIY gadgets, and embedded systems. With a nominal voltage of 3.7V and a capacity of 500mAh, this battery uses a 1S cell configuration, delivering reliable performance in lightweight applications. Designed for reusability, it offers an impressive life cycle of up to 500 charge-discharge cycles, making it a cost-effective and environmentally friendly power source. Its operating temperature range of 0°C to 50°C ensures safe and stable use in typical indoor environments. In terms of performance, a 500mAh lithium polymer battery like this one can last around five hours, depending on the device’s current draw. Battery capacity (measured in milliampere-hours or mAh) reflects the amount of charge the battery can store and supply. In practical terms, a 500mAh battery can deliver 500 milliamps for one hour or 100 milliamps for five hours before it needs to be recharged. This makes it well-suited for powering low-consumption electronics like wearables, sensors, and compact IoT devices. Features: Single cell configuration Life Cycle: 500 cycles or more Temperature range for operation: 0°C to 50°C Compact and lightweight for situations with limited space Ideal for sensors and integrated electronics, stable discharge rate Long-term cost effectiveness is ensured via rechargeable design.

Witty Fox WF-05 Bluetooth Module WittyFox WF-05 is a UART-based Bluetooth module capable of wirelessly communicating with devices such as your smartphones, laptops, and even other microcontrollers. The module incorporates the Feasycom BT986 Bluetooth chip which supports Bluetooth 5.2 and the latest technologies like Bluetooth Enhanced data rate (EDR) as well as Bluetooth Low Energy (BLE). It is pin-to-pin compatible with the existing HC-05 module and this module can easily be used to upgrade your existing projects to newer and more efficient Bluetooth technologies. This Bluetooth module itself has an onboard LED depicting the connection status and also has a “STATE” pin breakout to indicate to the parent device of the Bluetooth status. It also supports a relatively wide range of input voltage of 3.6-6V with reverse polarity protection to prevent accidental damage to the module. Pin Description: VCC: Input Power (3.6-6V) GND: GND TX: Connected to RX of the microcontroller RX: Connected to TX of the microcontroller State: Indicates the state of Bluetooth connection (HIGH - connected, LOW - not connected If you want to use this Bluetooth module in your home automation , for that you will need few essential components like: Arduino uno breadboard Jumper wires Relay Applications: IoT Applications Wireless communication between phones & microcontrollers BLE broadcasting Robotics Home Automation

XH-M602 4.2V Digital Battery Charging Control Module The XH-M602 Digital Battery Charging Control Module is designed to safely monitor and manage battery charging. With a 220V AC input and relay-controlled output, it ensures batteries are charged efficiently while preventing overcharging. The module features a durable plastic transformer and high-quality screw terminals, making it reliable and easy to integrate into various setups. Equipped with a bright three-digit seven-segment display and 0.1V accuracy, the module continuously monitors battery voltage in real-time. It can automatically disconnect the charger based on preset start and stop voltage values, effectively protecting batteries from damage due to overcharge or power loss. Ideal for a wide range of battery types and applications, it ensures both safety and longevity. Features: Safely controls battery charging with 220V AC input and relay output. Monitors battery voltage in real-time for accurate charging. Automatically stops charging to prevent overcharging, effectively protecting battery health Bright three-digit display with 0.1V accuracy for easy reading. Durable plastic transformer and strong screw terminals for secure connections.

XH-M633 Lithium Battery Charging Control Module The XH-M633 model of the lithium battery charging module comes equipped with safeguards against overcharging. This module finds wide-ranging applications in solar cells and lithium-ion batteries. Its digital display enables real-time voltage monitoring, which effectively safeguards the battery against damage due to power loss or overcharge. This charging control module for lithium batteries features an onboard relay connected to an output terminal, and an input terminal for 220V AC. It includes a high-quality plastic transformer and a bright seven-segment three-digit display. By actively monitoring the battery voltage through the Vin terminal, the module can disable the 220V output that powers the battery charger once the battery is fully charged. check out : AA-AAA-9V Battery Charger. Also check Parallel Charging Board designed for 6 packs of 26S lithium polymer batteries. It features a T Connector/JST-XH connector type and operates at an voltage range of 022.2VDC. The charging board supports a maximum charging current of 30A and is suitable for charging six packs with the same capacity and cell count simultaneously.

XL4015 5A Constant Current/Voltage LED Drives Lithium Battery Charging Module This versatile Buck converter serves as a standard step-down module equipped with overcurrent protection for a variety of applications. It functions as a charging device for lithium, nickel-cadmium, and nickel-hydrogen batteries, as well as battery packs, solar panels, wind turbines, and as a high-power LED driver module. The buck converter offers two modes, constant voltage and constant current, with corresponding indicators to display the current mode. In lithium battery charging mode, the float voltage and charge current can be adjusted to indicate charging or full charge status. Additionally, the module features current limiting protection, ensuring that it will not suffer damage in the event of a short circuit. This linear module has constant voltage and constant current function (CC CV). and it has a good performance. When you use it as a charger. this module use good chip as core and it is stable. also its ripple is low to 50mV. Features Short circuit protection: Yes(limited current 8A) Over-temperature protection: Yes (automatically turn off the output after over temperature) Input reverse connection protection: None, (If necessary, please input a large current diode in the input string) Installation method: 4 3mm silk Wiring method: terminal block or soldering terminal, V-IN is input. Applications: LCD Monitor and LCD TV Portable instrument power supply Telecom / Networking Equipment

XL4015 DC-DC Step Down Adjustable Power Supply Module The XL4015 power module is a DC to DC step-down (BUCK) power module that operates at a switching frequency of 180kHz. In such high frequency, it provides smaller-sized filter components compared with low frequency switching regulators. This DC-DC switching buck converter is capable of driving a 5A load with excellent line and load regulation. The main switching component is XL4015, an adjustable output version switching regulator. It is an efficient switching regulator and the output efficiency is significantly higher in comparison with the popular boost regulators. At higher input voltages, the regulator operates at a switching frequency of 180kHz, thus allowing the overall board size to be smaller and space-saving. It is a high-power switching module with a toroidal ring inductor. Pinouts: XL4015 Pinouts Applications: DIY based power supply To serve the power requirements of high-power Audio-based circuits. High current applications with small space

XL4016E1 DC 4-40V to DC 1.25-36V 8A Buck Converter Voltage Regulator 36V 24V 12V to 5V The XL4016 is a type of power converter that can lower the voltage efficiently and smoothly. It can handle a load of up to 12 amps and has good control over the output power, even when the input power varies. You only need a few extra parts to use this converter, as it already has built-in controls and a steady output frequency. The converter's control system can adjust how much power is delivered, anywhere from 0% to 100%. If there is too much current flowing, the converter has a safety feature that reduces its frequency. This helps protect the system from damage. Also, the converter has a built-in system to reduce the need for many extra components. Features: Wide 8V to 36V Input Voltage Range Output Adjustable from 1.25V to 32V High efficiency up to 96% Built-in thermal shutdown function Built-in current limit function Built-in output short protection function Excellent line and load regulation Applications: LCD Monitor and LCD TV Portable instrument power supply Telecom / Networking Equipment

XL6009 Boost Module The XL6009 Step Up module is one of the widely used modules, where there is a requirement of having a specific fixed output voltage, even when the input voltage is below or above the required output voltage. XL6009 module is a non-isolated step-up boost voltage converter featuring adjustable output voltage and high efficiency. It converts input voltage of 5-32V DC to an output voltage of 4-38V DC. Note: When using these modules remember that the output current will be a lot less than the input current, (remember - W = VA). For example, if you have a 10V output at 1A from a 5V input, the input current will be around 3.6A. The real-life maximum amount of power you can get out of these things is around 10W. Output current is greater than 2.5A (or output power greater than 10W) to work long hours, please add a heat sink. Features The performance is much higher than LM2577. Non-isolated Boost converter. It has a non-synchronous rectifier. Small and Handy voltage regulator module. Applications: Solar Cell Car Regulator Wind Power

XL6019 DC-DC 5A Adjustable Boost Power Supply Module DC to DC step up module based on the upgraded XL-Semi XL-6019, offering up to 5A switching current and conversion efficiency of up to 97%. This XL6019 boost converter has two input pins for VCC and GND on the left side of the module. It has two output pins on the right side of the module. To get the desired output voltage you have to rotate the trimpot screw. It changes the feedback resistance value and thus the output voltage with respect to the input voltage. As this module is a step-up converter, therefore, the output current is always smaller than the input current. If the output power is greater than 10W then add the heat sink with the module otherwise it may damage the module. Features With reverse connect protection, output 5V / 12V / 24V adjustable, beyond LM2577 performance. The built-in thermal protection, over-current protection reliability. Wide input voltage range, the input voltage up to 35V. Adjustable output voltage, maximum support 40V. The built-in thermal protection, over-current protection full reliability protection circuit, high reliability. System conversion efficiency can achieve 90% above, convenient thermal design. TO263-5 l standard packaging, suitable for booster application within 30W. Also check the LM2596 Mini 360 Aircraft Power Supply Step-down Module . It is a non-isolated BUCK module with synchronous rectification. The module features an integrally molded power inductor and a synchronous rectifier control chip. It includes built-in 160°C thermal shutdown for safety and boasts low output ripple of 30mV (no-load).