Tp4056 5v 1a Tenstar Robot Power Bank Charger Module + Usb Micro 18650 Lithium Battery Protection Board 2.6*1.7cm - Integrated Circuits - AliExpress
TP4056 - EasyEDA open source hardware lab
GitHub - SolderedElectronics/Lithium-ion-charger-with-protection---Eagle-files: Eagle files for Lithium-ion battery charger based on TP4056 with protection.