Adafruit
Adafruit Micro-Lipo Charger for LiPoly Batt with USB Type C Jack
The Adafruit Micro-Lipo Charger is a tiny, easy-to-use charger for single-cell 3.7V/4.2V lithium polymer and lithium ion rechargeable batteries. Simply plug ...
The Adafruit Micro-Lipo Charger is a tiny, easy-to-use charger for single-cell 3.7V/4.2V lithium polymer and lithium ion rechargeable batteries. Simply plug a USB-C cable into any USB power source and connect your battery via the JST connector — two LEDs show charging status at a glance (red = charging, green = complete).
Charging uses a three-stage process: preconditioning, constant-current fast charge, then constant-voltage trickle charge to keep the battery topped up. The default 100 mA charge rate works safely with any battery size and USB port. For larger batteries (500 mAh+), solder the on-board jumper to increase the charge current to 500 mA.
Key Features
- USB-C Input – 5V charging from any USB-C cable and power source
- Three-Stage Charging – Preconditioning, constant-current, and trickle charge
- 100 mA Default Charge Rate – Safe for all battery sizes; adjustable to 500 mA via solder jumper
- Dual Status LEDs – Red (charging) and green (complete)
- JST Battery Connector – Standard 2-pin JST PH for LiPo/LiIon batteries
- Breakout Pads – 0.1" pads for 5V, D−, D+, GND, and VBAT
- Compact Size – Small enough for desk use or permanent project mounting
Ideal For
- Charging LiPo/LiIon batteries for portable projects
- Wearable electronics with rechargeable batteries
- Desk-side battery charging station
- Embedding in projects for built-in charging capability
Package Contents
- 1× Adafruit Micro-Lipo Charger (assembled, ready to use)
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- JST PH
- A small keyed plug-and-socket connector with 2 mm pin spacing, often used for low-power electronics connections. You need the correct JST PH cable, and its current rating limits how much power should be passed through it.
- LiPo
- A lithium polymer rechargeable battery commonly used in portable electronics projects. It matters because LiPo batteries need correct charging circuitry and care, and this board includes hardware intended for that battery type.
- solder jumper
- A solder jumper is a small pair or group of pads on a circuit board that can be bridged or cut with solder to change a hardware setting. It matters because changing modes may require careful soldering rather than just changing software.
- USB-C
- A modern reversible USB connector used for power and data connections. On this product it matters because it can connect directly to a computer as well as to a microcontroller project.
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