18
English
Unknown Battery
Some Unknown Batteries may not be detectable by the charger. 
Unknown Batteries do not declare charging parameters in a manner 
recognizable by the charger. If an Unknown Battery is detected, then 
the charger will indicate charging as summarized in Table 7. 
Table 7: Charging an Unknown Battery.
Status Charger Display LED Indicator
Charger Powers On
IMPRES 2
CHARGER
Green for approximately 
1 second
Battery Detected
UNKNOWN 
BATTERY
Steady Red
Rapid Charging
RAPID CHARGE
Steady Red
Nearly Charged
• Battery Capacity 
UNKNOWN
TRICKLE CHARGE
Flashing Green
Charged 
• Battery Capacity 
UNKNOWN
CHARGE COMPLETE
Steady Green
Fault
WARNING:
NOT CHARGEABLE
REMOVE & REINSERT
Flashing Red
Standby
• Battery is waiting to rapid 
charge.
• Battery may be too hot, 
too cold, or low voltage.
WARNING:
HOT BATTERY
WAITING TO CHRGE
OR
COLD BATTERY
WAITING TO CHRGE
OR
VERY LOW BATTERY
WAITING TO CHRGE
Flashing Amber
MN002407A01.book  Page 18  Thursday, February 16, 2017  3:18 PM