Lithium Ion Battery Charger with Microchip MCP73831
Icstore TP4056 / TP 4056 / TPA4056 DC Charging Boost, 18650 3.7v Lipo, Lithium Ion Battery Charging Module Board Kit with Protection Circuit for Portable Electronics/Car/Motorcycle Use- Pack of 2 : Amazon.in:
LiPo Battery Charging - Circuit Cellar
2 In 1 DC 5V Micro USB To 3.7V Battery Charger Circuit Lithium Battery Charging Module Charge Discharge Circuit Power Bank Circuit For 18650 AA AAA 3.7V Batteries - Udvabony.com - Electronics,
Li-ion 3.7V battery + TP4056 charger + SX1308 DC step up regulator - low voltag - General Electronics - Arduino Forum
Make a 3.7 V Li – ion Battery Charger using TP-4056 (Part 9/9)