Onyehn 5Pcs 5V Boost Step Up Power Supply Module Lithium Battery Charge Protection Board 134N3P DIY Charger LED Display USB and Micro Port 5 Pack

Overview
134n3p is a single-chip solution designed for mobile power supply. It integrates a charge management module, a discharge management module, a power detection and LED indication module, and a protection module. The 134N3P has a built-in charge and discharge power MOS, and the charge current can be set. Z large charge current and Z large discharge current 1A. 134N3P integrates almost all safety functions such as constant temperature charging mode, over-temperature protection, over-charge and over-discharge protection, output over-voltage protection, output overload protection, and output short-circuit protection. In order to ensure the safety of the chip and lithium-ion battery, the 134N3P application circuit is simple, and only a few components are needed to achieve charge management and discharge management.

Specificaitons:
Input Voltage: 3.7V~5.5V
Charging Current: Z 1A
Output Current: Z is 1A
Output Voltage: 5V
BAT Discharge Termination Voltage: 2.9V
Preset 4.2V Charge Voltage with ±1% accuracy
Discharge Efficiency: 85% (input 3.7V, output 5V/1A)

Package Included:
5 X 5V Lithium Battery Charge Protection Board