Features: Experience efficient charging with our 3.7V Lithium Battery Boost Charging Module, featuring fast Charging support and 15W synchronous switches boost for performances. This module offer adjustable charging current, input over voltages and under voltages protective, ensuring safe and reliable operation. Suitable for enthusiasts and electronics hobbyists who require dependable power solution for their projects involving two or three series lithium batteries. Perfect for use in consumer electronics, this module can be easily integrated into devices requiring efficient battery management, utilizing Type C for enhances charging efficiency. With battery balancing for configurations, this module maximizes battery and performances, making it essential component for electronic. Specifications: Type:2S/3S Size:Approx.31x18mm/1.22x0.71inch Note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item. Package includes: 1Pc Charging Module