Adafruit LC709203F LiPoly / LiIon Fuel Gauge and Battery Monitor

I2C fuel-gauge breakout based on the LC709203F. Reports LiPoly/LiIon cell voltage and percentage state-of-charge without the non-linear decoding math.

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
SDA / SDI
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 · connector
JST battery ports

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

45 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 45

TP4056 LiPo Battery Charger Module with Protection visual preview

Related groups

4 groups

Batteries

9V alkaline cells, CR2032 coin cells, 3.7V LiPo packs (1000–1200mAh), 7.4V 2S LiPo, 18650 Li-ion holders (1–6 cells), AA/AAA holders in every configuration, and snap leads with barrel adapters.

Power · Batteries · 105 parts

Power supplies

Wall adapters (5V–24V), adjustable and fixed buck/boost/buck-boost converters (MT3608, LM2596-class), USB-C PD triggers (HUSB238), breadboard supplies, DIN-rail units and passive barrel-jack adapters.

Power · Supplies & regulators · 146 parts

Solar

Solar panels from 1.5V 250mA flexible film to 18V 10W polysilicon, MPPT solar power managers (DFRobot 5V and 9V/12V/18V, Waveshare 6V–24V), bq25185 charger boards and LTC3588 energy-harvesting breakouts.

Power · Solar power · 28 parts

3D printing

DFRobot 1.75 mm PLA in 1 kg spools makes up the bulk of the group, in over 15 colors. Specialty options include PVA in both diameters, NinjaFlex flexible filament, Proto-Pasta conductive PLA, and wood-fill. OverLord printer spares and OverLord printers round out the hardware side.

Tools & prototyping · 3D printing · 53 parts