GLOBALSAT TR-151SP - Manual (Page 9)

TR151-SP page 9
2.3 How to Turn on/ Charge/ Reset
Device is always on until battery exhausted.
Charging: Before using TR151-SP for the first time, please fully charge it by connecting to AC
power adapter for at least 23 hours (The attached battery is specially designed for TR151-SP.)
Reset:
Reset button: Pressing the Reset Button for 3 seconds will reset the device.
Note: Reset button is disabled when the external power connected