Casio IT-300 Series User Manual

Also see for IT-300 Series: Important notes

E-9Lithium-ion Battery PackEach lithium-ion battery pack has its life. The life span heavily depends on how thebattery pack is charged or stored which may cause deterioration of the battery packto shorten the life span if it is handled improperly. Note the tips below to make thebattery pack last long.— Be sure to charge the battery pack before using it if the battery pack is used for thefirst 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 therepetition of charging the battery pack, be sure that the remaining capacity is lowbefore you start charging.— Be sure to charge the battery pack in recommended temperature range. Thetemperature range is dependant on device you use to charge including batterychargers and handheld terminals. Refer to the respective user guides. Chargingthe battery pack in a temperature outside of the recommended range causesdeterioration.— When used at low temperatures, the battery pack has a reduced capacity and willsupply 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 insidecauses deterioration. Be sure to resume an ordinary room temperature on thebattery pack and then leave it unattended for approximately one hour beforecharging.— After charging the battery pack, if the performance of the battery pack does notshow any recovery, it is a sign of ending the life. Replace it with a new batterypack.— Avoid the battery pack with a full of the capacity to store for a long period oftime. If you need to store it for a long period, be sure that the remaining capacityis 30 to 50 percent and to store in a moderate low temperature. This can reducedeterioration.— The battery pack gradually deteriorates over time. In particular, storing (or using)the fully charged battery pack at high temperatures tends to accelerate battery packdeterioration.•