Gravity: I2C 3.7V Li Battery Fuel Gauge
I2C Gravity breakout that accurately measures 3.7V lithium battery voltage and state-of-charge with a low-power alert output.
Pinout
- +Gravity connector pin labelled +
Power VCC input for the module, supported 3.3V to 6.0V.
Type · Power - -Gravity connector pin labelled -
Power ground reference.
Type · Ground - CGravity connector pin labelled C
I2C clock signal, SCL.
Type · I2C - DGravity connector pin labelled D
I2C data signal, SDA.
Type · I2C - ALRboard pad labelled ALR
ALRT active-low low battery power alert interrupt.
Type · GPIO - BAT INbattery input connector labelled BAT IN
3.7V lithium battery input, 2.5V to 4.2V battery voltage range.
Type · Unknown - REV BATindicator labelled REV BAT
Reverse battery indicator; lights when the battery connection is reversed.
Type · Unknown
| Pin | Position | Type | Function |
|---|---|---|---|
| + | Gravity connector pin labelled + | Power | Power VCC input for the module, supported 3.3V to 6.0V. |
| - | Gravity connector pin labelled - | Ground | Power ground reference. |
| C | Gravity connector pin labelled C | I2C | I2C clock signal, SCL. |
| D | Gravity connector pin labelled D | I2C | I2C data signal, SDA. |
| ALR | board pad labelled ALR | GPIO | ALRT active-low low battery power alert interrupt. |
| BAT IN | battery input connector labelled BAT IN | Unknown | 3.7V lithium battery input, 2.5V to 4.2V battery voltage range. |
| REV BAT | indicator labelled REV BAT | Unknown | Reverse battery indicator; lights when the battery connection is reversed. |
Pin details
7 connections- +Gravity connector pin labelled +
Power VCC input for the module, supported 3.3V to 6.0V.
Power - -Gravity connector pin labelled -
Power ground reference.
Ground - CGravity connector pin labelled C
I2C clock signal, SCL.
I2C - DGravity connector pin labelled D
I2C data signal, SDA.
I2C - ALRboard pad labelled ALR
ALRT active-low low battery power alert interrupt.
GPIO - BAT INbattery input connector labelled BAT IN
3.7V lithium battery input, 2.5V to 4.2V battery voltage range.
Unknown - REV BATindicator labelled REV BAT
Reverse battery indicator; lights when the battery connection is reversed.
Unknown
Start wiring
I2C · USB · 5 V · Module
Confirm the data interface matches your host board.
Module pins: +, -, C, D. Schematik maps them to your board in the app.
Charging
46 other optionsSingle-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.
7.4V Lipo Battery Charger visual preview7.4V Lipo Battery Charger
Adafruit LC709203F LiPoly / LiIon Fuel Gauge and Battery Monitor visual previewAdafruit LC709203F LiPoly / LiIon Fuel Gauge and Battery Monitor
Adafruit LiIon/LiPoly Backpack Add-On for Pro Trinket/ItsyBitsy visual previewAdafruit LiIon/LiPoly Backpack Add-On for Pro Trinket/ItsyBitsy
Adafruit MAX17048 LiPoly / LiIon Fuel Gauge and Battery Monitor visual previewAdafruit MAX17048 LiPoly / LiIon Fuel Gauge and Battery Monitor
Adafruit Micro Lipo - USB LiIon/LiPoly charger [v2] visual previewAdafruit Micro Lipo - USB LiIon/LiPoly charger [v2]
Adafruit Micro-Lipo Charger for LiPo/LiIon Batt w/MicroUSB Jack visual previewAdafruit Micro-Lipo Charger for LiPo/LiIon Batt w/MicroUSB Jack
$6.95
Adafruit Micro-Lipo Charger for LiPoly Batt with USB Type C Jack visual previewAdafruit Micro-Lipo Charger for LiPoly Batt with USB Type C Jack
BAT Detector v1.0 visual previewBAT Detector v1.0
Battery Detector with Polymer Lithium Ion 1050mAh 3.7V visual previewBattery Detector with Polymer Lithium Ion 1050mAh 3.7V
Battery Detector with Polymer Lithium Ion 5100mAh 3.8V visual previewBattery Detector with Polymer Lithium Ion 5100mAh 3.8V
Crazyflie 2.0 - Qi Inductive Charging Expansion Board visual previewCrazyflie 2.0 - Qi Inductive Charging Expansion Board
DC-DC Charge Discharge Integrated Module (5V/2A) visual previewDC-DC Charge Discharge Integrated Module (5V/2A)
Related groups
4 groups
1-Way 18650 Battery Holder visual previewBatteries
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 · 104 parts
10W 4 USB Power Adapter visual previewPower 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 · 147 parts
3.8 / 1.3mm or 3.5 / 1.1mm to 5.5 / 2.1mm DC Jack Adapter Cable visual previewSolar
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
1.75mm PLA (1kg) - Black visual preview3D 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