Pack of 10 CN3163 MPPT 1A modules designed to improve conversion efficiency when charging single 18650 lithium cells. Key benefits Improves charging efficiency using MPPT technology to extract more power from a solar source or variable input. Provides a controlled 1A charging current suitable for individual 18650 lithium cells. Compact modules that are easy to integrate into small battery projects, DIY chargers, and retrofit applications. Consistent performance across modules, simplifying build and replacement for multicell or multiunit setups. Function and performance Function: Maximum power point tracking charging controller that optimizes power transfer from a solar panel or other power source to a single 18650 cell. Output current: Rated for 1A charging, suitable for standard 18650 charging needs. Performance: Designed to increase conversion efficiency compared to basic charging circuits, reducing wasted input power and improving charge completion under variable input conditions. Compatibility and physical attributes Compatible with individual 18650 lithiumion cells and systems that require a dedicated 1A charging module. Form factor: Compact PCB module for straightforward mounting and wiring in small enclosures or project boards. Materials: Standard electronic components and PCB construction suitable for electronic hobbyist and smallscale applications. Practical use cases DIY portable power banks: Add reliable 1A MPPT charging to singlecell 18650 power bank builds to improve charge efficiency from small solar panels. Remote sensors and lowpower IoT devices: Use the module with a small solar panel to keep a single 18650 cell charged for remote or offgrid electronics. Hobbyist battery maintenance and prototyping: Integrate into bench chargers, singlecell test rigs, or modular battery packs where individual cell charging control is needed. What you receive Ten identical CN3163 MPPT 1A 18650 charging modules, ready for integration into multiple projects or replacements. This product is intended for use with 18650 lithium cells and is suited to hobbyist, prototyping, and smallscale solar charging applications.