Adafruit Mini Lipo w/Mini-B USB Jack - USB LiIon/LiPoly charger

Oh so handy, this little lipo charger is small and easy to use, allowing you to keep it on your desk or mount it seamlessly into any project. Simply plug it via any MiniUSB cable into a USB port and connect a 3.7V/4.2V lithium polymer or lithium ion rechargeable battery into the JST plug on the other end.

There are two LEDs—one red and one green. While charging, the red LED is lit. When the battery is fully charged, the green LED turns on. Charging is performed in three stages: preconditioning charge, constant-current fast charge, and constant-voltage trickle charge to keep the battery topped-up. The charge current is 100mA by default, compatible with any size battery and USB port.

Change to 500mA mode by soldering the jumper on the front, ideal for charging batteries with 500mAh size or larger. Designed specifically for Adafruit LiPoly/LiIon batteries, as other batteries may have different voltage, chemistry, polarity, or pinout. Comes assembled and tested with a free bonus JST cable. Includes 5V input via Mini-B USB connector. Batteries are not included.