Adafruit
Adafruit Micro Lipo w/MicroUSB Jack - USB LiIon/LiPoly charger [v1]
The Adafruit Micro Lipo with MicroUSB Jack is a compact charger for single-cell 3.7V/4.2V lithium polymer and lithium ion rechargeable batteries. Plug in any...
The Adafruit Micro Lipo with MicroUSB Jack is a compact charger for single-cell 3.7V/4.2V lithium polymer and lithium ion rechargeable batteries. Plug in any Micro USB cable to a USB power source and connect your battery via the JST connector — two LEDs show status at a glance (red = charging, green = complete). For a USB-C version, see the Micro-Lipo Charger with USB-C.
Charging uses a three-stage process: preconditioning, constant-current fast charge, then constant-voltage trickle charge. The default 100 mA charge rate works safely with any battery size. For larger batteries (500 mAh+), solder the jumper on the front to increase the charge current to 500 mA.
Key Features
- Micro USB Input – 5V charging from any Micro USB 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 for LiPo/LiIon batteries
- 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
- Embedding in project enclosures for built-in charging
- Quick battery top-ups from any USB port
Package Contents
- 1× Adafruit Micro Lipo Charger with MicroUSB (assembled and tested)
- 1× 2-pin JST cable (bonus)
Jargon buster
Plain-language definitions for the technical terms used above.
- 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.
- UPS
- An uninterruptible power supply is a battery-backed power system that keeps a device running when external power is unplugged or fails. For an embedded computer, it helps prevent sudden shutdowns that can corrupt files or interrupt a project.
- 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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