Charge your lithium batteries safely and efficiently with this high-quality USB-powered Lithium Battery Charging and Protection Module. Designed for single lithium batteries or multiple lithium batteries connected in parallel, this compact module features a convenient Micro USB input, allowing you to connect directly to standard mobile phone chargers for easy and reliable charging. Key Features: · USB-Powered Charging Module: Equipped with a Micro USB socket compatible with common 5V mobile phone chargers, enabling simple plug-and-play charging for lithium batteries. · Wide Battery Compatibility: Supports charging and discharge protection for 3.6V and 3.7V lithium-ion batteries, including 18650 cells and lithium polymer batteries. · Overcharge and Over-discharge Protection: Automatically cuts off charging at 4.2V ±1%, and protects batteries from over-discharge below 2.5V to extend battery lifespan and ensure safety. · Over-current Protection: Safeguards your batteries with a maximum protection current of up to 3A to prevent damage during charging and discharging. · DIY-Friendly Design: Includes easily accessible wiring solder joints for flexible and convenient customization or integration into your projects. · Compact and Lightweight: Measuring only 2.5 x 2 cm and weighing approximately 27g, this module is ideal for portable applications and space-saving installations. · Adjustable Charging Current: Allows fine-tuning of charging current via RPROG resistor settings, supporting currents from 50mA up to 1000mA to match various battery capacities. Specifications: · Input Voltage: 5V DC via Micro USB or solder pads · Charge Cut-off Voltage: 4.2V ±1% · Maximum Charging Current: 1000mA (adjustable) · Battery Over-discharge Protection Voltage: 2.5V · Battery Over-current Protection Current: 3A · Dimensions: 2.5 x 2 cm (1 x 0.8 in) · Weight: Approx. 27g (1 oz) Package Includes: · 10 x Lithium Battery Charging and Protection Modules This module is an essential accessory for hobbyists and professionals working with lithium-ion or lithium polymer batteries, providing reliable charge control and battery safety in a compact form factor. Ensure proper voltage input and correct battery connections to maximize performance and battery life during charging and discharging cycles.