E-9
Lithium-ion Battery Pack
Each lithium-ion battery pack has its life. The life span heavily depends on how the 
battery pack is charged or stored which may cause deterioration of the battery pack 
to shorten the life span if it is handled improperly. Note the tips below to make the 
battery pack last long.
—  Be sure to charge the battery pack before using it if the battery pack is used for the 
fi rst time or if it has not been used for a long period of time.
—  If the battery pack is repeatedly charged, the life span becomes short. To avoid the 
repetition of charging the battery pack, be sure that the remaining capacity is low 
before you start charging.
—  Be sure to charge the battery pack in recommended temperature range. The 
temperature range is dependant on device you use to charge including battery 
chargers and Handheld Terminals. Refer to the respective user guides. Charging 
the battery pack in a temperature outside of the recommended range causes 
deterioration.
—  When used at low temperatures, the battery pack has a reduced capacity and will 
supply power for shorter time. 
The life span of the battery pack is also shortened.
—  Charging the battery pack while the battery pack itself is freeze including inside 
causes deterioration. Be sure to resume an ordinary room temperature on the 
battery pack and then leave it unattended for approximately one hour before 
charging.
—  After charging the battery pack, if the performance of the battery pack does not 
show any recovery, it is a sign of ending the life. Replace it with a new battery 
pack.
—  Avoid the battery pack with a full of the capacity to store for a long period of 
time. If you need to store it for a long period, be sure that the remaining capacity 
is 30 to 50 percent and to store in a moderate low temperature. This can reduce 
deterioration.
—  The battery pack gradually deteriorates over time. In particular, storing (or using) 
the fully charged battery pack at high temperatures tends to accelerate battery pack 
deterioration. 
•