Charging

Charging a LiPo and knowing its state of charge are separate jobs. A TP4056 fills the cell; only an I2C fuel gauge like the MAX17048 can tell you what's left.

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.

7.4V Lipo Battery Charger

Adafruit LC709203F LiPoly / LiIon Fuel Gauge and Battery Monitor

Adafruit LiIon/LiPoly Backpack Add-On for Pro Trinket/ItsyBitsy

Adafruit MAX17048 LiPoly / LiIon Fuel Gauge and Battery Monitor

View all 47 parts

The TP4056 module with protection is the default single-cell charger; DFRobot's MicroUSB and Type-C LiPo chargers add selectable 50/200/500mA charge currents for smaller cells.
Adafruit's MAX17048 and LC709203F breakouts and DFRobot's Gravity I2C fuel gauge report cell voltage and percentage over I2C — a charger alone cannot tell you state of charge.
Charger/booster combos keep 5V up while charging: Seeed's Lipo Rider Plus outputs 5V/2.4A, Adafruit's PowerBoost 500 and 1000 boost from a single cell, and Waveshare's mini UPS charges and outputs 5V 2.5A simultaneously.
Qi wireless charging ranges from Adafruit's Universal Qi receiver modules and Seeed's 5V/0.6A transmitter to DFRobot's 5V/1A through 5V/5A wireless charging modules and the Crazyflie 2.0 Qi inductive charging expansion board.

All parts

47 parts

7.4V Lipo Battery Charger

Adafruit LC709203F LiPoly / LiIon Fuel Gauge and Battery Monitor

Adafruit LiIon/LiPoly Backpack Add-On for Pro Trinket/ItsyBitsy

Adafruit MAX17048 LiPoly / LiIon Fuel Gauge and Battery Monitor

Adafruit Micro Lipo - USB LiIon/LiPoly charger [v2]

Adafruit Micro-Lipo Charger for LiPo/LiIon Batt w/MicroUSB Jack

$6.95

Adafruit Micro-Lipo Charger for LiPoly Batt with USB Type C Jack

BAT Detector v1.0

Battery Detector with Polymer Lithium Ion 1050mAh 3.7V

Battery Detector with Polymer Lithium Ion 5100mAh 3.8V

DFRobot DFR0208 lithium battery charger

Gravity: I2C 3.7V Li Battery Fuel Gauge

LiPo Charger - MicroUSB

LiPo Charger - Type C

Lipo Rider Plus (Charger/Booster) - 5V/2.4A USB Type C

Lithium Battery Charger V1.0

Lithium Ion Coin Cell Charger

Mini Lipo w/Mini-B USB Jack - USB LiIon/LiPoly charger

Pocket Socket USB 5V 1 Amp Output

PowerBoost 1000 Basic - 5V USB Boost @ 1000mA from 1.8V+

PowerBoost 1000 Charger - Rechargeable 5V Lipo USB Boost @ 1A [1000C]

PowerBoost 500 Basic - 5V USB Boost @ 500mA from 1.8V+

PowerBoost 500 Charger - Rechargeable 5V Lipo USB Boost @ 500mA+

Smart Multifunctional Charger

Smart Wireless Charger Transmitter - 5V&0.6A

Solar Lipo Charger (3.7V)

SparkFun LiPo Charger Basic - Micro-USB

SparkFun LiPo Charger Plus

Tiny Wireless Charger Receiver (Qi Compatible)

USB / DC / Solar Lithium Ion/Polymer Charger

USB Battery Charger (LIR2032)

USB Charger for 7.4V LiPo Battery

Crazyflie 2.0 - Qi Inductive Charging Expansion Board

DC-DC Charge Discharge Integrated Module (5V/2A)

Mini Uninterruptible Power Supply module, 5V 2.5A Output

MP2636 Power Booster & Charger Module

PowerBoost 500 Shield - Rechargeable 5V Power Shield

Snap-on Enclosure for Adafruit USB / DC / Solar Lithium Charger

TP4056 Li-Ion/LiPo charger module with protection

Universal Qi Wireless Charging Module - 20mm Forward MicroUSB

Universal Qi Wireless Charging Module - 20mm Reverse MicroUSB

Universal Qi Wireless Charging Module - 40mm Reverse MicroUSB

Universal Qi Wireless Receiver Module

Wireless Charger Kit (QI Compatible)

Wireless Charging Module 5V/1A

Wireless Charging Module 5V/2A

Wireless Charging Module 5V/5A