Problem  | Cause  | Solution  | 
|---|---|---|
LEDs do not light when the device is inserted.  | The cradle is not receiving power.  | Ensure the power cable is connected securely to both the cradle and to AC power.  | 
The device is not seated firmly in the cradle.  | Remove and reinsert the device into the cradle, ensuring it is firmly seated.  | |
The device battery is not charging.  | The device was removed from the cradle, or the cradle was unplugged from AC power too soon.  | 
  | 
The battery is faulty.  | Verify that other batteries charge properly. If so, replace the faulty battery.  | |
The device is not fully seated in the cradle.  | Remove and reinsert the device into the cradle, ensuring that it is firmly seated.  | |
Extreme battery temperature.  | The battery does not charge if the ambient temperature is below 0°C (32°F) or above 50°C (122°F).  | |
The spare battery is not charging.  | The battery is not fully seated in the charging slot.  | Remove and re-insert the spare battery in the cradle, ensuring it is firmly seated. The 4680 mAh battery fully charges in less than five hours.  | 
The battery is inserted incorrectly.  | Reinsert the battery so that the charging contacts on the battery align with the contacts on the cradle.  | |
The battery is faulty.  | Verify that other batteries charge properly. If so, replace the faulty battery.  |