Charge the Nike+ SportWatch GPS by simply popping out the USB connector embedded in the watch strap and plugging it into your computer's USB port. The Nike+ SportWatch should fully charge in two hours.
You can also charge your SportWatch battery by plugging it into a non-computer USB charger such as a wall socket adapter or a car charger.
Note: If your SportWatch battery has drained completely, you will need to connect the device to your computer to update to the current time and date.
When linked to GPS or the Nike+ Sensor, the SportWatch battery can last up to 9 hours. When not recording a run, it can last up to 70 days.
You check the battery level in 3 ways: