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The Adafruit MAX17048 LiPoly/LiIon Fuel Gauge and Battery Monitor gives you accurate battery voltage and charge percentage readings for your 1S 3.7–4.2V lith...

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The Adafruit MAX17048 LiPoly/LiIon Fuel Gauge and Battery Monitor gives you accurate battery voltage and charge percentage readings for your 1S 3.7–4.2V lithium polymer or lithium ion battery. Instead of guessing remaining capacity from a non-linear voltage curve, this smart sensor does the maths for you — delivering a reliable percentage readout just like the battery indicator on your phone.

Communicating over I2C, the MAX17048 works with any microcontroller or microcomputer from Arduino to Raspberry Pi. It runs happily on both 3.3V and 5.0V power and logic, so there's no need to worry about level shifting.

Key Features

  • Accurate Fuel Gauging – Reports battery voltage and remaining charge percentage via I2C
  • Wide Compatibility – Works with 3.3V and 5.0V logic and power supplies
  • STEMMA QT / Qwiic Interface – Solderless I2C connections via JST SH connectors on both sides
  • Dual JST 2-PH Battery Ports – Connect your LiPo/LiIon battery to either port
  • Configurable Alerts – Set low-battery and other threshold alerts to suit your application
  • Low Power Modes – Built-in power management options for battery-conscious designs

Ideal For

  • Battery-powered IoT projects requiring accurate charge monitoring
  • Portable electronics with battery percentage displays
  • Feather and microcontroller projects with LiPo batteries
  • Any project where knowing remaining battery life is critical

Package Contents

  • 1× Adafruit MAX17048 Fuel Gauge breakout board
  • JST PH jumper cable
Note: STEMMA QT cable is not included. A 1S (3.7–4.2V) LiPoly or LiIon battery is required and sold separately.

Resources

Jargon buster

Plain-language definitions for the technical terms used above.

breakout
A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
I2C
I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
IoT
Short for Internet of Things, meaning physical devices that connect to networks or the internet to send data or be controlled remotely. It matters if you want projects such as connected sensors, remote controls or classroom data-logging activities.
JST PH
A small keyed plug-and-socket connector with 2 mm pin spacing, often used for low-power electronics connections. You need the correct JST PH cable, and its current rating limits how much power should be passed through it.
LiPo
A lithium polymer rechargeable battery commonly used in portable electronics projects. It matters because LiPo batteries need correct charging circuitry and care, and this board includes hardware intended for that battery type.
MAX17048
A battery fuel-gauge chip that estimates how much charge is left in a LiPo battery. It matters for portable projects because your software can monitor battery level instead of only measuring voltage.
microcontroller
A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
pH
A measure of how acidic or alkaline a liquid is, on a scale where 7 is neutral. For a water monitoring kit, pH tells you about water chemistry and whether the included probe matches the range and accuracy your project needs.
Qwiic
Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
STEMMA
A plug-and-cable connection system used on some maker electronics boards to make wiring simpler. If a product uses STEMMA, you need the matching cable or connector type to plug it in without soldering.
STEMMA QT
A small plug-in connector system for I2C boards that lets you connect compatible sensors and controllers without soldering. It matters because it can make wiring faster and less error-prone, especially when adding several small modules to a project.

Related Tutorials

Free guides on learn.littlebird.com.au

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