5-Pack 3.7V Lithium Battery Charger Module, USB Type-C, 1A

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• [MODERN USB TYPE-C INPUT]: Equipped with a convenient USB Type-C port, allowing you to use modern mobile phone chargers and Type-C to Type-C cables for power. This module is compatible with most PD fast charging heads, providing a flexible and universal 5-6V power input for your projects.
• [ULTRA-COMPACT FOR EMBEDDED PROJECTS]: With a minimal footprint of just 14x18x5mm, these charger boards are incredibly small, making them perfect for integrating rechargeable power into space-constrained DIY electronics, portable devices, cosplay props, and custom gadgets where every millimeter counts.
• [INTELLIGENT 1A LINEAR CHARGING]: Delivers a steady 1A charging current to 3.7V lithium batteries, terminating automatically when the current drops to 100mA to prevent overcharging. The smart charging cycle restarts if the battery drops below 4.05V and includes a 100mA pre-charge function for deeply discharged cells below 2.9V.
• [INTEGRATED MULTI-PROTECTION CIRCUIT]: Safeguards your batteries and projects with built-in over-voltage (input), over-current (4A), and over-discharge (2.4V) protection. The onboard protection circuit requires initial activation by connecting a power supply. Note: This module outputs the battery voltage (up to 4.2V); for a stable 5V output, a separate boost converter module is required.
• [DUAL LED STATUS INDICATORS]: Features clear, intuitive red and green LED indicators to display charging status at a glance, eliminating guesswork. A solid red light indicates charging is in progress, while a green light signifies the battery is fully charged. We provide comprehensive after-sales support: complete digital documentation including user guides and technical references is available through our store customer service, and our support team is ready to assist with installation, programming, and troubleshooting to help you get started quickly.