74 B a t t e r y a n d c h a r g e r i n f o r m a t i o nbegin charging the battery. If the battery is completely discharged, it may take severalminutes before the charging indicator appears on the display or before any calls can bemade.Always switch the device off and disconnect the charger before removing the battery.Unplug the charger from the electrical plug and the device when not in use. Do not leave afully charged battery connected to a charger, since overcharging may shorten its lifetime. Ifleft 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). Extremetemperatures reduce the capacity and lifetime of the battery. A device with a hot or coldbattery may not work temporarily. Battery performance is particularly limited intemperatures well below freezing.Do not short-circuit the battery. Accidental short-circuiting can occur when a metallicobject such as a coin, clip, or pen causes direct connection of the positive (+) and negative(-) terminals of the battery. (These look like metal strips on the battery.) This might happen,for example, when you carry a spare battery in your pocket or purse. Short-circuiting theterminals may damage the battery or the connecting object.Do not dispose of batteries in a fire as they may explode. Batteries may also explode ifdamaged. Dispose of batteries according to local regulations. Please recycle when possible.Do not dispose as household waste.Do not dismantle, cut, open, crush, bend, deform, puncture, or shred cells or batteries. In theevent of a battery leak, do not allow the liquid to come in contact with the skin or eyes. Inthe event of such a leak, flush your skin or eyes immediately with water, or seek medicalhelp.Do not modify, remanufacture, attempt to insert foreign objects into the battery, or immerseor expose it to water or other liquids.Improper battery use may result in a fire, explosion, or other hazard. If the device or batteryis dropped, especially on a hard surface, and you believe the battery has been damaged, takeit to a service centre for inspection before continuing to use it.Use the battery only for its intended purpose. Never use any charger or battery that isdamaged. Keep your battery out of the reach of small children.■ Nokia battery authentication guidelinesAlways use original Nokia batteries for your safety. To check that you are getting an originalNokia battery, purchase it from an authorised Nokia dealer, and inspect the hologram labelusing the following steps:Successful completion of the steps is not a total assurance of the authenticity of the battery.If you have any reason to believe that your battery is not an authentic, original Nokiabattery, you should refrain from using it, and take it to the nearest authorised Nokia servicepoint or dealer for assistance. Your authorised Nokia service point or dealer will inspect the