Two Way Lithium Battery Boost Module 5V UPS Protection Charging board

This versatile boost module functions as a compact UPS and power bank, designed to automatically switch between external power and a Li-ion battery (typically one or two 18650 cells). It steps up the battery voltage to a stable 5 V output for USB-powered devices. The integrated charger supports auto-recharge when external power is available and includes full protection for safe operation: overcharge, under-discharge, over-current, short-circuit, and thermal safety.

Features:

• Seamless power switching between battery and external USB power without interruption

• Boost output delivers stable 5 V at up to 1–3 A depending on variant

• Built-in charging circuit for 1‑cell or 2‑cell configurations

• Protection functions: overcharge, under-voltage, over-current, short-circuit, thermal cut-off

• LED indicators show charging status and battery output

• Compact board designed for DIY power banks, portable systems, and UPS setups