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USB LiIon/LiPoly charger - v1.2

Product Code:ADA-0259

Ex.Tax £9.99

Availability: 10

USB LiIon/LiPoly charger - v1.2
USB LiIon/LiPoly charger - v1.2
USB LiIon/LiPoly charger - v1.2
Questions1 Answers1 | Expand All
Solar power for a MKR GSM1400
I'd like to "solar-enable" a outdoor animal feeder project. The Arduino MKR GSM1400 I am utilising specs a 1200mAh battery minimum. So... If I implement a combination of 5V ~300mA solar panel, an ADA-0259 charger and one of your 3.7v 2500mAh Lipo batteries, will this be sufficient to power the GSM1400? My assumption is yes based on my crude 'stone knives and bearskins' calculations. However, your confirmation would be much appreciated prior to my purchase. Secondly, should I attach the batter directly to the 1400 or should it be connected to your charger? I find no documentation that confirms this eather way - except that I understand the 1400 does have an onboard charge controller. Slightly confusing. Kind regards, and a sincere thank you in advance! Joe.
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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 performed 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. Keep the battery connected to the charger and pass power through the additional JST connector using the included cable!

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

  • Comes assembled and tested, includes a 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!
  • Batteries and USB cable not included.

Datasheets, EagleCAD PCB files, Fritzing object and more in the tutorial


  • Dimensions: 33mm x 35mm x 7mm (1.3in x 1.4in x 0.3in)
  • Weight: 5.7g ( 0.2oz)

Read Adafruit's tutorial all about Lithium Ion/Polymer batteries for more details!

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