Battery chargers

Professional Li-ion battery charging requires CC/CV (Constant Current/Constant Voltage) technology to ensure safe, efficient charging while maximising battery lifespan. This Li-ion charger delivers professional-grade charging performance with 1A fast-charging capability, modern USB-C connectivity, and safety monitoring. Designed for Arduino projects, IoT devices, and portable electronics, this charger provides the reliable, high-current charging that demanding applications require. The integrated dual-LED status system and protection circuitry ensure safe operation, while the compact design enables easy project integration.

**IMPORTANT SAFETY AND USAGE REQUIREMENTS:** This charger provides CC/CV charging for single-cell 3.7V Li-ion/LiPo batteries only. Maximum recommended battery capacity is 4000mAh for optimal charging performance. Input voltage must be 4.5-5.5V via USB-C (standard USB power sources compatible). This board does not include reverse polarity protection, overvoltage protection, or short-circuit protection. Ensure correct battery polarity and inspect connections before use. For applications requiring protection features, consider our protected charger variant. Never leave charging unattended, monitor battery temperature during charging, and ensure adequate ventilation. Compatible with standard JST-PH-2mm battery connectors. Comprehensive technical documentation, charging guidelines, and safety protocols are available in our documentation resources below.

Product usage tips: The red LED glowing means the battery is charging. The green LED glowing means the battery is charged. Easy embedding into a project with the four mounting holes on the board. Comes with 5 pins that need to be soldered.

Note: This charger has no protection against reverse polarity, short-circuit, too high or too low voltage. If you’re looking for a charger with a protector, click here.

The BQ24295 is a versatile Li-ion battery charger designed to provide efficient and reliable charging for single-cell lithium-ion or lithium-polymer batteries. It supports various charging modes, including constant current (CC) and constant voltage (CV) charging, to ensure the battery is charged quickly and safely.

The BQ24295 charger operates on a wide input voltage range, typically from 4.35V to 17V, allowing it to be powered by a variety of power sources, including USB ports and AC adapters. It also features integrated power path management, which allows simultaneous charging of the battery while powering the connected device, providing uninterrupted operation.

Lithium batteries are charged differently than regular batteries and devices. You’ll need a li-ion charger like this one to charge them. Integrated with the CC/CV charging technology, it is the simplest way to charge a lithium-ion battery.

The board has a USB Type-C connector for power, a JST-type connector for batteries, the charging circuit, a protector, and two status LEDs. Comes with 7 pins that need to be soldered.

Product usage tips:

Note: This charger has protection against short-circuit, too high, or too low voltage. It has no protection against reverse polarity.

Introducing our MPPT Li-Ion CN3791 Charger Board, your solution for solar energy to power your electronics. Designed for hobbyists, makers, and professionals, this board simplifies efficient and reliable Li-Ion battery charging via solar panels.Simply connect one of our Li-Ion batteries and a solar panel and your project is now solar-powered! The battery acts as an accumulator and will continue powering your projects even when the sun isn’t shining, and when it is, your battery will be charging! Its compact form factor and user-friendly design make it ideal for integrating into a wide range of projects, from portable devices to off-grid sensor nodes, ensuring your creations stay powered sustainably.

At its core, the CN3791 chip delivers charging algorithms tailored for Li-Ion batteries, guaranteeing precise control, maximum efficiency, and safety. The board features quick-connect spring terminals for effortless solar panel and battery integration, alongside a JST connector compatible with our extensive range of Li-Ion batteries. This thoughtful design ensures seamless setup and performance, making it a great choice for demanding applications.

Designed and manufactured in the EU, our MPPT Li-Ion CN3791 charger board adheres to the highest quality and safety standards. Our open-source principles with detailed documentation and technical support empower your innovation. Whether you’re building an Arduino-powered weather station or a custom solar-powered robot, this board offers the reliability, performance, and community backing you need to bring your ideas to life.