1.56V power supply: supports a single battery paralleled connection with a default charging current of 1A. Compatibility: suitable for various 3.7V batteries including 18650 cells and lithium polymer (LiPo) batteries. Charging settings: optional charging cutoff voltages of 1.4V or 4.35V. Safety and protection: the 4057 Type C USB Battery Charging Module offers dual protection features, ensuring safe and efficient charging for electronics projects. Benefits at a glance Safe, reliable Liion/LiPo charging from a wide input range (1.56V) with a predictable 1A default current. Broad battery compatibility including common 18650 and LiPo cells, ideal for DIY projects and custom packs. Flexible voltage termination options to match different battery chemistries and usage requirements. Builtin dual protection features for enhanced safety during charging, reducing the risk of overcharge and faults. Applications and use scenarios DIY electronics projects: use as a compact charging module for singlecell Liion/LiPo packs in handheld gadgets, custom robots, or sensor nodes, powered by USBC or lowvoltage sources. Battery pack maintenance and portability: integrate into small power packs or portable devices to safely charge 18650 or LiPo cells from USBC or lowvoltage inputs. Prototyping and testing: employ the module in development rigs that require configurable cutoff voltages and reliable protection while experimenting with different 3.7V battery configurations.