USB / DC / Solar Lithium Ion/Polymer Charger

Multi-source LiPoly charger accepting USB, DC barrel, or solar panel input. Designed for outdoor and solar-powered projects; see the bq24074-based Universal version for wider compatibility.

BATT
2-pin JST battery port for a single 3.7V/4.2V lithium-ion or lithium-polymer battery, as stated by Adafruit guide/product text
Type · powerVoltage · 3.7V nominal / 4.2V charge battery connection
LOAD
load output port for powering another project while the charger shares input power and battery power
Type · power outputVoltage · battery/load rail for 3.7V LiPo system; guide states project can be powered from LOAD output
USB
USB mini-B charging power input; guide states charging can use a USB mini-B cable
Type · power inputVoltage · 5V USB input
DC / SOLAR
DC jack / solar-panel input for charging; guide states charge with 5-6V DC or 6V solar panel
Type · power inputVoltage · 5-6V DC input; 6V solar panel recommended
CHRG
low-battery/status LED output labelled CHRG per Adafruit guide text

Start wiring

I2C · USB · 5 V · Module

Verify supply voltage and logic levels before powering up.

Module pins: BATT. 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.

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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