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following chargers:
If a battery is being used for the first time or if the battery has not been used for a prolonged period, it may be necessary to connect the charger, then disconnect and reconnect it to begin charging the battery. If the battery is completely discharged, it may take several minutes before the charging indicator light is displayed.
Unplug the charger from the electrical plug and the device when not in use. Do not leave a fully charged battery
connected to a charger, since overcharging may shorten its lifetime. If left unused, a fully charged battery will lose its charge over time.
Always try to keep the battery between 15°C and 25°C (59°F and 77°F). Extreme temperatures reduce the capacity and lifetime of the battery. A device with a hot or cold battery may not work temporarily. Battery performance is particularly limited in temperatures well below freezing.
Do not dispose of batteries in a fire as they may explode. Batteries may also explode if damaged.
Never use any charger that is damaged.
Important: Battery operating times are estimates only and
depend on network conditions, features used, battery age and condition, temperatures to which battery is exposed, and many other factors.