Logical pinout · physical placement not verified

VIN
Board power input, use the same voltage as the microcontroller logic level.
Type · PowerVoltage · 3V to 5VDC
BAT
Output from the battery input voltage.
Type · PowerVoltage · 1S LiIon/LiPoly battery voltage, typically 3.7V to 4.2V
GND
Common ground for power and logic.
Type · GroundVoltage · 0V
SCL
I2C clock line.
Type · I2CVoltage · VIN logic level, 10K pullup on board
SDA
I2C data line. Adafruit Learn labels the board pin SDI and says it connects to microcontroller SDA.
Type · I2CVoltage · VIN logic level, 10K pullup on board
INT
Interrupt output, can pull low when configured voltage or percentage thresholds are crossed.
Type · GPIOVoltage · VIN logic level, pulled up to VIN with 10K
QSTART
Quick-start hardware input for resetting the MAX17048.
Type · GPIOVoltage · VIN logic level
STEMMA QTQwiic
Two JST-SH 4-pin I2C connectors for STEMMA QT/Qwiic cabling and chaining.
Type · UnknownVoltage · VIN, GND, SCL, SDA
JST-PH BATTERY PORTS
Two equivalent JST-PH battery ports. Connect battery to either one and load/charger to the other; observe polarity.
Type · UnknownVoltage · 1S LiIon/LiPoly battery voltage

Pin	Type	Function	Voltage
VIN	Power	Board power input, use the same voltage as the microcontroller logic level.	3V to 5VDC
BAT	Power	Output from the battery input voltage.	1S LiIon/LiPoly battery voltage, typically 3.7V to 4.2V
GND	Ground	Common ground for power and logic.	0V
SCL	I2C	I2C clock line.	VIN logic level, 10K pullup on board
SDA	I2C	I2C data line. Adafruit Learn labels the board pin SDI and says it connects to microcontroller SDA.	VIN logic level, 10K pullup on board
INT	GPIO	Interrupt output, can pull low when configured voltage or percentage thresholds are crossed.	VIN logic level, pulled up to VIN with 10K
QSTART	GPIO	Quick-start hardware input for resetting the MAX17048.	VIN logic level
STEMMA QTQwiic	Unknown	Two JST-SH 4-pin I2C connectors for STEMMA QT/Qwiic cabling and chaining.	VIN, GND, SCL, SDA
JST-PH BATTERY PORTS	Unknown	Two equivalent JST-PH battery ports. Connect battery to either one and load/charger to the other; observe polarity.	1S LiIon/LiPoly battery voltage

Logical pinout · physical placement not verified

Pin details

9 connections

VIN
Board power input, use the same voltage as the microcontroller logic level.
PowerVoltage · 3V to 5VDC
BAT
Output from the battery input voltage.
PowerVoltage · 1S LiIon/LiPoly battery voltage, typically 3.7V to 4.2V
GND
Common ground for power and logic.
GroundVoltage · 0V
SCL
I2C clock line.
I2CVoltage · VIN logic level, 10K pullup on board
SDA
I2C data line. Adafruit Learn labels the board pin SDI and says it connects to microcontroller SDA.
I2CVoltage · VIN logic level, 10K pullup on board
INT
Interrupt output, can pull low when configured voltage or percentage thresholds are crossed.
GPIOVoltage · VIN logic level, pulled up to VIN with 10K
QSTART
Quick-start hardware input for resetting the MAX17048.
GPIOVoltage · VIN logic level
STEMMA QTQwiic
Two JST-SH 4-pin I2C connectors for STEMMA QT/Qwiic cabling and chaining.
UnknownVoltage · VIN, GND, SCL, SDA
JST-PH BATTERY PORTS
Two equivalent JST-PH battery ports. Connect battery to either one and load/charger to the other; observe polarity.
UnknownVoltage · 1S LiIon/LiPoly battery voltage

Start wiring

I2C · USB · 5 V · Module

Confirm the data interface matches your host board.

Module pins: VIN, GND, SCL, SDA. Schematik maps them to your board in the app.

Charging

46 other options

Single-cell LiPo chargers (TP4056, MicroUSB/Type-C modules), charger/booster combos (PowerBoost 500/1000, Lipo Rider Plus 5V/2.4A), I2C fuel gauges (MAX17048, LC709203F) and Qi wireless charging coils.

View all 46

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