B a t t e r y i n f o r m a t i o n878. Battery information■ Charging andDischargingYour phone is powered by arechargeable battery.Note that a new battery's fullperformance is achieved only aftertwo or three complete charge anddischarge cycles!The battery can be charged anddischarged hundreds of times but itwill eventually wear out. When theoperating time (talk-time andstandby time) is noticeably shorterthan normal, it is time to buy a newbattery.Use only batteries approved by thephone manufacturer and rechargeyour battery only with the chargersapproved by the manufacturer.Unplug the charger when not in use.Do not leave the battery connectedto a charger for longer than a week,since overcharging may shorten itslifetime. If left unused a fullycharged battery will discharge itselfover time.Temperature extremes can affect theability of your battery to charge.Use the battery only for its intendedpurpose.Never use any charger or batterywhich is damaged.Do not short-circuit the battery.Accidental short-circuiting canoccur when a metallic object (coin,clip or pen) causes direct connectionof the + and - terminals of thebattery (metal strips on the battery)for example when you carry a sparebattery in your pocket or purse.Short-circuiting the terminals maydamage the battery or theconnecting object.Leaving the battery in hot or coldplaces, such as in a closed car insummer or winter conditions, willreduce the capacity and lifetime ofthe battery. Always try to keep thebattery between 15°C and 25°C(59°F and 77°F). A phone with a hotor cold battery may temporarily notwork, even when the battery is fullycharged. Batteries' performance isparticularly limited in temperatureswell below freezing.Do not dispose of batteries in a fire!Dispose of batteries according tolocal regulations (e.g. recycling). Donot dispose as household waste.