Qwiic Fuel Gauge - MAX17048

The Qwiic Fuel Gauge is a battery monitoring breakout based on the MAX17048, designed for single-cell LiPo batteries. Rather than simply reading pack voltage, the MAX17048 uses a sophisticated algorithm to provide accurate State of Charge (SOC) readings — so instead of seeing "3.83 V", you get "73% capacity remaining".

Connects via Qwiic (I²C) for solderless hookup. A fully featured Arduino library makes reading battery data as simple as a single function call.

Key Features

• MAX17048 Fuel Gauge IC – Advanced SOC algorithm, not just voltage-based estimation
• State of Charge – Accurate battery percentage readings
• Pack Voltage – Real-time voltage monitoring
• Single-Cell LiPo – Designed for 3.7 V lithium polymer batteries
• Qwiic Connector – Solderless I²C connection (4-pin JST, 1 mm pitch)
• Arduino Library – Full-featured library with simple API

Ideal For

• Battery-powered IoT devices
• Portable project battery monitoring
• Low-battery warning and shutdown systems

Package Contents

• 1× Qwiic Fuel Gauge breakout (MAX17048)

Resources

• MAX17048 Datasheet (PDF)
• Arduino Library (GitHub)
• Schematic (PDF)
• Hardware Design Files (GitHub)