Charging the battery – once your kit is assembled, you can charge the battery through the onboard charger whenever you plug it in through the USB port. The charging rate is set to 212mA (R3: 4.7k charging resistor, R2: 2K resistor yields 500mA charging rate). You should use a battery that is at least 500mAh. When charging, the onboard “CHRG” LED will turn ON, and will turn OFF when the battery is fully charged. If you have an OLEDMote loaded with the default sketch (see below) it will also show the battery voltage on the screen as it charges (need to turn it ON).