SparkFun Adjustable LiPo Charger

The SparkFun Adjustable LiPo Charger is a single-cell lithium polymer (LiPo) and lithium ion battery charger. Because it’s adjustable, this charger will be able to safely charge most of our single-cell batteries with ease. With its onboard charge rate selector, you will be able to set the maximum amount of current to charge your battery from 15mA to 500mA.

Once the board is configured for the battery, you can connect power from either a microUSB cable or the pins below the USB connector labeled GND and INPUT. Once power is connected, you can install a single LiPo battery to one of the three battery connectors, the JST connector, PTH pins marked BATT, or the 2450 coin cell holder on the back of the board. The input voltage for the MCP73831 charger IC is between 3.75V and 6V. To fully charge a LiPo battery, it is recommended to have a voltage of around 5V. The charge IC will regulate the voltage down to safely charge the LiPo battery.

Note: The switches on the Adjustable LiPo Charger come shipped with all the switches in the ON position. Before configuring the board, all the switches should be moved to the OFF position.

Get Started with the SparkFun Adjustable LiPo Charger Guide

  • Operating Voltage: 3.75V to 6V
  • Adjustable Current: 15mA–500mA
  • Three Battery Input Options
    • JST Connector
    • PTH Pins
    • Coin Cell Holder (2450)
  • Charge Status LED
  • Custom Charge Rate Settings

SparkFun Adjustable LiPo Charger Product Help and Resources

Adjustable LiPo Charger Hookup Guide

September 28, 2017

The SparkFun Adjustable LiPo Charger is a single-cell lithium polymer (LiPo) and lithium ion battery charger. Because it’s adjustable, this charger will be able to safely charge all of our singe-cell batteries.

Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

3 Electrical Prototyping

Skill Level: Competent - You will be required to reference a datasheet or schematic to know how to use a component. Your knowledge of a datasheet will only require basic features like power requirements, pinouts, or communications type. Also, you may need a power supply that?s greater than 12V or more than 1A worth of current.
See all skill levels


Customer Comments

  • Can this be used to build a device charger? Like using this with the SparkFun USB Type A Female Breakout to build a charger capable of handling cell phones, tablets, etc?

Customer Reviews

4 out of 5

Based on 2 ratings:

Currently viewing all customer reviews.

1 of 1 found this helpful:

OK if you are careful

I tried to measure the voltage across the system using the battery +/- vias, but ended up bumping the leads of my multimeters together and burning out the board in an instant.

Maybe put the vias farther apart or figure out another way to let us measure battery voltage?

simple, little and reliable

I charged continuously18650 cells with no problems