Adafruit Micro Lipo - USB LiIon/LiPoly charger

Oh so adorable, this is the tiniest little lipo charger, so handy you can keep it in any project box! It's also easy to use. Simply plug in the gold-plated contacts into any USB port and 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 and ready for use, the green LED turns on. Seriously, it could not get easier. 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 charge current is 100mA by default, so it will work with any size battery and USB port. If you want, you can easily switch it to 500mA mode by moving the slide switch on the top over to "High" mode, suitable for charging batteries with 500mAh size or larger.For use with Adafruit LiPoly/LiIon batteries only! Other batteries may have different voltage, chemistry, polarity, or pinout. Comes assembled and tested with a free bonus JST cable!5V input via PCB-style USB connector. For charging single Lithium Ion/Lithium Polymer 3.7/4.2V batteries (not for older 3.6/4.1V cells). The MicroLipo charger can get hot during charging. Grab it by the sides and unplug, then let cool before removing the battery. Batteries not included.