USB/DC Lithium Polymer battery charger 5-12V - 3.7/4.2v cells

This product is discontinued however if you're looking for an alternative check out our USB LiIon/LiPoly charger, USB / DC / Solar Lithium Ion/Polymer charger, or our Adafruit Micro Lipo w/MicroUSB Jack - USB LiIon/LiPoly charger!
1-9 $17.95
10-99 $16.16
100+ $14.36
  • Description-


    Charge your single-cell lithium ion/polymer battery any which way you like with this board. Have a USB connection? No problem, just plug into the miniUSB connector. Only have a wall adapter? Any standard 2.1mm DC adapter which puts out 5 to 12VDC will work fine. If both are plugged in, the charger will automatically choose whichever has the highest voltage.

    Other nice things about this charger include multiple LEDs for power & charging status, including a charging LED which will blink when the battery is full. If the charger gets too hot from high-speed charging, it will slow down the charge rate automatically. You can easily adjust the charge rate up to 1.2A or down to 100mA.

    For use with Adafruit Lipoly/LiIon batteries only! Other batteries may have different voltage, chemistry, polarity or pinout.

    • Use USB or DC power - 5 to 12V input
    • Charges one single-cell 3.7/4.2v batteries (not for older 3.6/4.1v cells) with constant current/constant voltage
    • Three indicator LEDs - green for Power, orange for charging and red for error
    • Charging LED will blink when the battery is full
    • You don't have to worry about heat dissipation in the charger, even when plugging in a 12V DC power jack - thermal protection inside will slow down the charge rate to prevent damage
    • 2 JST connections so you can keep the battery plugged in and powering your project
    • Terminal block connections galore (if you don't like JST connectors) just solder in 3.5mm terminal blocks
    • Default charge rate is about 500mA, but you can easily change this by soldering in a through-hole resistor on. The chip can do 100-1200 mA charging
    • Safety timer will stop charging after about 14 hours
    • The chip supports a standard 10K thermistor, which we have stuffed as a standard resistor. You can solder in a thermistor easily
    • Lots of information in the datasheet for the MCP73861
    • Fully assembled, tested and comes with a free JST cable
    • Schematic available for your perusal
    • Dimensions: 1.75" x 1.6"


    Battery, USB cable and DC power plug not included. But we do stock them in the store!

  • Technical Details+

    Technical Details


    • Dimensions: 40mm x 44mm x 13mm (1.6in x 1.7in x 0.5in)
    • Weight: 11.7g ( 0.4oz)
  • Learn+


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