The TP4056-42-ESOP8 with PMIC - Battery Management ESOP-8 RoHS manufactured by Extension Microelectronics is a Li-Ion battery charger designed to charge single cell Lithium Ion batteries. It employs a constant current/ constant voltage algorithm with a wide input and output voltage range. The charge current is set by two solder resistors, and can be fine-tuned with a 3rd external resistor. The charger also includes advanced features such as short circuit protection, thermal regulation and auto-recharge. The operating temperature range is -25°C to +85°C and it is RoHS compliant. The package is an 8-pin ESOP package, which is 5.2 x 3.2 x 1.45 mm in size.