USB Li-Ion/LiPoly Charger - v1.2

$15.95 ea


  • Part no.: 2144366
  • Manufacturer: Adafruit Industries
  • Manufacturer no.: 259
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USB Li-Ion/LiPoly Charger - v1.2

This is a Lithium Ion and Lithium Polymer battery charger based on the MCP73833. It uses a USB mini-B for connection to any computer or 'USB wall adapter'. Charging is done in three stages: first a preconditioning charge, then a constant-current fast charge and finally a constant-voltage trickle charge to keep the battery topped-up. The fast-charge current is 500mA by default, but is easily adjustable from 100mA up to 1000mA by soldering a through-hole resistor on-board.

This board is great for DIY projects because it has 3 indicator LEDs - one for power, one for charging status and a third that indicates when charging is complete. You may also keep the battery connected to the charger and pass power through the additional JST connector using the included cable!

  • Comes assembled and tested with a free bonus JST cable!
  • 5V input via mini-B USB connector
  • For charging single Lithium Ion/Lithium Polymer 3.7/4.2v batteries (not for older 3.6/4.1v cells)
  • 500mA charge current, adjustable from 100mA to 1000mA by soldering in a resistor
  • Separate JST connectors for battery and load system so batteries don't have to be removed for charging
  • Chip supports a 10K NTC thermistor which we have stuffed as a plain 10K. For people who require temperature monitors (using high charge rates), remove the 10K and solder in the thermistor in its place
  • 0.1" (2.54mm) breakouts for the battery, DC, and status LEDs
  • Free 2-pin JST cable included!
  • Dimensions: 33mm x 35mm x 7mm (1.3in x 1.4in x 0.3in)
  • Weight: 5.7g ( 0.2oz)
  • Batteries and USB cable not included.
    Read the tutorial on Lithium Ion/Polymer batteries for more details!

    Tutorials on the Adafruit Learning System featuring this product:

  • Multi-Cell LiPo Charging: How to charge your multi-cell LiPo packs
  • LED Ampli-Tie: Wearable VU meter necktie with Flora
  • Li-Ion & LiPoly Batteries: All about the power packs that propel your projects!

    Resources & Downloads

    MCP73833 Datasheet
    Sample Code (github)

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