Power bank module JX887Y

JX887Y Power Bank Module (Dual USB 5V Output) The JX887Y Power Bank Module is a compact charging and boost converter board designed to build your own DIY power bank using a single-cell 3.7V lithium-ion or lithium-polymer battery. It features dual USB outputs, a Micro USB charging input, built-in battery protection circuits, and a 4-level LED battery indicator, making it ideal for portable charging projects and battery-powered electronics. Specifications Model: JX887Y Product Type: DIY Power Bank Charging & Boost Module Battery Type: 3.7V Lithium-ion / Lithium Polymer Supported Batteries: 18650, Li-ion, Li-Po (Single Cell or Multiple Cells in Parallel) Battery Voltage Range: 3.2V – 4.2V Charging Input: Micro USB, 5V DC Recommended Input Current: 1A or higher USB Output Voltage: 5V DC USB Output Current: 1A / 2A (Dual USB) USB Ports: 2 × USB Type-A Output Battery Indicator: 4-Level LED Display Protection Functions: Over-charge, Over-discharge, Over-current, Short-circuit Protection Auto Shutdown: Yes (when no load is detected) Module Dimensions: Approx. 69 × 32 × 8 mm Features Converts 3.7V battery voltage to stable 5V USB output Dual USB ports for charging two devices Built-in lithium battery charging and protection circuit 4-LED battery capacity indicator Intelligent automatic power-off when idle Supports single-cell or multiple parallel-connected lithium batteries Compact and lightweight design Easy to integrate into DIY power bank projects Applications DIY Power Banks 18650 Battery Projects Portable USB Power Supplies Arduino & ESP32 Portable Projects Mobile Phone Charging USB-Powered Electronics Emergency Backup Power DIY Electronics Projects Note: This module is designed only for 3.7V lithium batteries connected in parallel. Do not connect batteries in series, as doing so may permanently damage the module.