# Charging module 3.7V lithium battery, with 5V boost

> Module for building a powerbank from a 3.7V Li-Ion battery (1S). Charges via MicroUSB port at 4.2VDC and outputs a fixed 5VDC via USB female port (voltage boost), maximum output current 0.5A. Includes charge/discharge protection between 3.0 and 4.2V. No balancing, no current or voltage regulation.

- Page: https://sigmanortec.ro/en/charging-module-37v-lithium-battery-with-5v-boost
- Price: 3.81 RON
- Availability: In stock; 1-2 zile
- Reference: 33365 · EAN: 5944785068051
- Category: Electronic components > Modules for Batteries > Charging and Balancing Modules
- Specifications: Technology: Lithium Ion; Load voltage: 4.2VDC; sway: Not; tension: AD; Number of cells: 1S; Supply Voltage: 3; Maximum Input Voltage: 4.2; Minimum Output Voltage: 5; Maximum Output Voltage: 5; Source Type: high; Current Adjustment: Not; Voltage Adjustment: Not; Adjustment Type: Fixed; Maximum Output Current: 0.5
- Package (shipping data): 0.003 kg
- Updated: 2026-09-23
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 01:32 (Europe/Bucharest)

## Description

Quickly transform a 3.7V Li-Ion battery into a practical power bank, charges via MicroUSB port and delivers a stable 5V output through a female USB, includes protection for charging and discharging between 3.0 and 4.2V, provides current up to 500mA for charging the phone or powering devices at 5V.
Module for making a powerbank.
This module incorporates a charging module for a 3.7V lithium battery via the MicroUSB socket and a 5V step-up converter accessible through the female USB socket.
Connect a lithium battery and you have a powerbank with which you can charge your phone's battery and power various devices at 5V through the USB socket.
Specifications:
Protection for lithium battery charging/discharging: 3.0 - 4.2V
Output voltage: 5VDC (via step-up converter)
Charging port type: Micro USB
Discharge port type: USB 2.0 female
Current: 500mA