Problem  | Cause  | Solution  | 
|---|---|---|
The Spare Battery Charging LED does not light when the spare battery is inserted.  | The spare battery is not correctly seated.  | Remove and reinsert the spare battery into the charging slot, ensuring it is correctly seated.  | 
The spare battery is not charging.  | The charger is not receiving power.  | Ensure the power cable is connected securely to both the charger and to AC power.  | 
The spare battery is not correctly seated.  | Remove and re-insert the battery into the battery adapter, ensuring it is correctly seated.  | |
The battery adapter is not seated properly.  | Remove and reinsert the battery adapter into the charger, ensuring it is correctly seated.  | |
The battery was removed from the charger or the charger was unplugged from AC power too soon.  | Ensure that the charger is receiving power. Ensure the spare battery is seated correctly. The battery charges from fully depleted to 90% in less than 2 hours.  | |
The battery is faulty.  | Verify that other batteries charge properly. If so, replace the faulty battery.  | |
The ambient temperature of the cradle is too warm.  | Move the cradle to an area where the ambient temperature is between 0°C (+32°F) and +50°C (+122°F).  |