Logical pinout · physical placement not verified

VIN
Logic-level supply pin. Adafruit Learn states the chip can safely run from 3-5VDC and VIN should match the microcontroller logic level.
Type · PowerVoltage · 3-5VDC logic supply
GND
Common ground for power and logic.
Type · GroundVoltage · 0V
SCL
I2C clock line. Adafruit Learn notes a 10K pull-up on this pin.
Type · I2C
SDASDI
I2C data line. The Learn page labels this board pin SDI and says it is SDA, with a 10K pull-up.
Type · I2C
STEMMA QT
STEMMA QT / Qwiic connector carrying the board I2C connection to compatible boards and accessories.
Type · Unknown
JST battery ports
Two equivalent JST battery/load ports. Adafruit Learn says either port can connect the battery and the other can connect the charger or load; watch battery polarity if not using an Adafruit battery.
Type · PowerVoltage · LiPoly / LiIon battery connection
INT
Interrupt output. Adafruit Learn says it can pull low when voltage or percentage drops below a threshold and is pulled up to VIN with a 10K resistor.
Type · GPIO
THERM
Thermistor input. Adafruit Learn says connect a 10K thermistor to THERM and the other thermistor side to ground to read battery-pack temperature.
Type · Analog
LED trace
Back-side LED trace pads. The Learn page says cutting the LED trace disables the breakout LED to conserve battery power.
Type · Control

Pin	Type	Function	Voltage
VIN	Power	Logic-level supply pin. Adafruit Learn states the chip can safely run from 3-5VDC and VIN should match the microcontroller logic level.	3-5VDC logic supply
GND	Ground	Common ground for power and logic.	0V
SCL	I2C	I2C clock line. Adafruit Learn notes a 10K pull-up on this pin.
SDASDI	I2C	I2C data line. The Learn page labels this board pin SDI and says it is SDA, with a 10K pull-up.
STEMMA QT	Unknown	STEMMA QT / Qwiic connector carrying the board I2C connection to compatible boards and accessories.
JST battery ports	Power	Two equivalent JST battery/load ports. Adafruit Learn says either port can connect the battery and the other can connect the charger or load; watch battery polarity if not using an Adafruit battery.	LiPoly / LiIon battery connection
INT	GPIO	Interrupt output. Adafruit Learn says it can pull low when voltage or percentage drops below a threshold and is pulled up to VIN with a 10K resistor.
THERM	Analog	Thermistor input. Adafruit Learn says connect a 10K thermistor to THERM and the other thermistor side to ground to read battery-pack temperature.
LED trace	Control	Back-side LED trace pads. The Learn page says cutting the LED trace disables the breakout LED to conserve battery power.

Logical pinout · physical placement not verified

Pin details

9 connections

VIN
Logic-level supply pin. Adafruit Learn states the chip can safely run from 3-5VDC and VIN should match the microcontroller logic level.
PowerVoltage · 3-5VDC logic supply
GND
Common ground for power and logic.
GroundVoltage · 0V
SCL
I2C clock line. Adafruit Learn notes a 10K pull-up on this pin.
I2C
SDASDI
I2C data line. The Learn page labels this board pin SDI and says it is SDA, with a 10K pull-up.
I2C
STEMMA QT
STEMMA QT / Qwiic connector carrying the board I2C connection to compatible boards and accessories.
Unknown
JST battery ports
Two equivalent JST battery/load ports. Adafruit Learn says either port can connect the battery and the other can connect the charger or load; watch battery polarity if not using an Adafruit battery.
PowerVoltage · LiPoly / LiIon battery connection
INT
Interrupt output. Adafruit Learn says it can pull low when voltage or percentage drops below a threshold and is pulled up to VIN with a 10K resistor.
GPIO
THERM
Thermistor input. Adafruit Learn says connect a 10K thermistor to THERM and the other thermistor side to ground to read battery-pack temperature.
Analog
LED trace
Back-side LED trace pads. The Learn page says cutting the LED trace disables the breakout LED to conserve battery power.
Control

Start wiring

I2C · USB · 5 V · Module

Confirm the data interface matches your host board.

Module pins: VIN, JST battery ports, GND, SCL, SDA / SDI. 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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