Logical pinout · physical placement not verified

5V output
Boosted shield output rail for Arduino, Adafruit Learn states the boost section takes 3-4V LiIon/LiPoly input and boosts it to 5.2V before a Schottky diode drops it to about 5V.
Type · PowerVoltage · about 5V output, can dip to 4.8V over 1A; 500mA fuse on boost output
GND
Ground reference for the PowerBoost shield and stacked Arduino.
Type · GroundVoltage · 0V
BATJST battery input
LiIon/LiPoly battery input via the shield battery connector; Learn describes 3-4VDC input from the battery into the boost section.
Type · PowerVoltage · 3-4VDC LiIon/LiPoly battery input
Micro USB charge input
Micro USB connector used to charge the battery; Adafruit Learn says plugging Arduino USB will not charge the battery and the shield microUSB charge rate is up to 500mA.
Type · PowerVoltage · USB 5V charge input, up to 500mA charge rate
Power switch pads
Optional booster enable switch connection. Learn states a custom switch can be soldered to the middle pin and the pin right below it; the switch carries signal, not power.
Type · ControlVoltage · signal-level enable switch, any voltage/current switch rating is fine per source
Battery monitor solder jumper
Solder jumper that can route battery voltage to one Arduino analogue input for monitoring low battery ahead of time.
Type · AnalogVoltage · battery voltage sense from LiIon/LiPoly pack
+5V LED
Blue indicator LED showing the booster is running.
Type · Unknown
LOW LED
Red indicator LED showing the LiPoly battery is at 3.2V or lower and may need recharge or replacement.
Type · UnknownVoltage · low-battery indication at 3.2V or lower
CHG LED
Yellow charge-status LED next to the microUSB jack; on means charging.
Type · Unknown
DONE LED
Green charge-status LED next to the microUSB jack; on means battery is full.
Type · Unknown

Pin	Type	Function	Voltage
5V output	Power	Boosted shield output rail for Arduino, Adafruit Learn states the boost section takes 3-4V LiIon/LiPoly input and boosts it to 5.2V before a Schottky diode drops it to about 5V.	about 5V output, can dip to 4.8V over 1A; 500mA fuse on boost output
GND	Ground	Ground reference for the PowerBoost shield and stacked Arduino.	0V
BATJST battery input	Power	LiIon/LiPoly battery input via the shield battery connector; Learn describes 3-4VDC input from the battery into the boost section.	3-4VDC LiIon/LiPoly battery input
Micro USB charge input	Power	Micro USB connector used to charge the battery; Adafruit Learn says plugging Arduino USB will not charge the battery and the shield microUSB charge rate is up to 500mA.	USB 5V charge input, up to 500mA charge rate
Power switch pads	Control	Optional booster enable switch connection. Learn states a custom switch can be soldered to the middle pin and the pin right below it; the switch carries signal, not power.	signal-level enable switch, any voltage/current switch rating is fine per source
Battery monitor solder jumper	Analog	Solder jumper that can route battery voltage to one Arduino analogue input for monitoring low battery ahead of time.	battery voltage sense from LiIon/LiPoly pack
+5V LED	Unknown	Blue indicator LED showing the booster is running.
LOW LED	Unknown	Red indicator LED showing the LiPoly battery is at 3.2V or lower and may need recharge or replacement.	low-battery indication at 3.2V or lower
CHG LED	Unknown	Yellow charge-status LED next to the microUSB jack; on means charging.
DONE LED	Unknown	Green charge-status LED next to the microUSB jack; on means battery is full.

Logical pinout · physical placement not verified

Pin details

10 connections

5V output
Boosted shield output rail for Arduino, Adafruit Learn states the boost section takes 3-4V LiIon/LiPoly input and boosts it to 5.2V before a Schottky diode drops it to about 5V.
PowerVoltage · about 5V output, can dip to 4.8V over 1A; 500mA fuse on boost output
GND
Ground reference for the PowerBoost shield and stacked Arduino.
GroundVoltage · 0V
BATJST battery input
LiIon/LiPoly battery input via the shield battery connector; Learn describes 3-4VDC input from the battery into the boost section.
PowerVoltage · 3-4VDC LiIon/LiPoly battery input
Micro USB charge input
Micro USB connector used to charge the battery; Adafruit Learn says plugging Arduino USB will not charge the battery and the shield microUSB charge rate is up to 500mA.
PowerVoltage · USB 5V charge input, up to 500mA charge rate
Power switch pads
Optional booster enable switch connection. Learn states a custom switch can be soldered to the middle pin and the pin right below it; the switch carries signal, not power.
ControlVoltage · signal-level enable switch, any voltage/current switch rating is fine per source
Battery monitor solder jumper
Solder jumper that can route battery voltage to one Arduino analogue input for monitoring low battery ahead of time.
AnalogVoltage · battery voltage sense from LiIon/LiPoly pack
+5V LED
Blue indicator LED showing the booster is running.
Unknown
LOW LED
Red indicator LED showing the LiPoly battery is at 3.2V or lower and may need recharge or replacement.
UnknownVoltage · low-battery indication at 3.2V or lower
CHG LED
Yellow charge-status LED next to the microUSB jack; on means charging.
Unknown
DONE LED
Green charge-status LED next to the microUSB jack; on means battery is full.
Unknown

Start wiring

I2C · USB · 5 V · Module

Verify supply voltage and logic levels before powering up.

Module pins: 5V output, BAT / JST battery input, Micro USB charge input, GND, Battery monitor solder jumper. 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

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 · 104 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 · 147 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