Nokia 9290 Nokia 9290 Communicator User Guide - Page 28

Getting started 10 Leaving the battery in hot or cold conditions, such as in a closed car in summer or winter conditions, will reduce the capacity and lifetime of the battery. Always try to keep the battery between +15°C (+59°F) and +25°C (+77°F). A communicator with a hot or cold battery may temporarily not work, even when the battery is fully charged. The performance of Lithium-ion batteries is particularly limited in temperatures below 0°C (+32°F). Do not dispose of batteries in a fire! Batteries must be recycled or disposed of properly. Batteries must not be disposed of in municipal waste. Note that a new battery's full performance is achieved only after two or three complete charge and discharge cycles. Use only batteries approved by the communicator manufacturer and recharge the battery only with the chargers approved by the manufacturer. With approved chargers and accessories, the battery can be charged continuously. The battery need not be fully discharged before recharging. When a charger is not in use, disconnect it from the power source. Do not leave the battery connected to a charger for longer than a week, since excessive charging may shorten its life. If left unused, a fully charged battery will discharge itself over time. The battery can be charged and discharged hundreds of times, but it will eventually wear out. When the operating time (talk-time and stand-by time) is noticeably shorter than normal, it is time to buy a new battery. Temperature extremes will affect the ability of your battery to charge: allow it to cool down or warm up first.