284. Confirm that the 20-digit code is valid by following the instructions atwww.nokia.com/batterycheck.What if your battery is not authentic?If you cannot confirm that your Nokia battery with the hologram on the label is an authenticNokia battery, please do not use the battery. Take it to the nearest authorized Nokia servicepoint or dealer for assistance. The use of a battery that is not approved by the manufacturermay be dangerous and may result in poor performance and damage to your device and itsenhancements. It may also invalidate any approval or warranty applying to the device.To find out more about original Nokia batteries, visit www.nokia.com/battery.7. EnhancementsPractical rules about accessories and enhancements• Keep all accessories and enhancements out of the reach of small children.• When you disconnect the power cord of any accessory or enhancement, grasp andpull the plug, not the cord.• Check regularly that enhancements installed in a vehicle are mounted and areoperating properly.• Installation of any complex car enhancements must be made by qualified personnel only.Care and maintenanceYour device is a product of superior design and craftsmanship and should be treated with care.The following suggestions will help you protect your warranty coverage.• Keep the device dry. Precipitation, humidity, and all types of liquids or moisture cancontain minerals that will corrode electronic circuits. If your device does get wet, removethe battery, and allow the device to dry completely before replacing it.• Do not use or store the device in dusty, dirty areas. Its moving parts and electroniccomponents can be damaged.• Do not store the device in hot areas. High temperatures can shorten the life of electronicdevices, damage batteries, and warp or melt certain plastics.• Do not store the device in cold areas. When the device returns to its normal temperature,moisture can form inside the device and damage electronic circuit boards.• Do not attempt to open the device other than as instructed in this guide.