User Guide for Nokia N810
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Do not use or store the device in dusty, dirty areas...Its moving parts and electronic components can be damaged......
Always create a backup of data you want to keep, such as contacts and calendar notes...To reset the device from time to time for optimum performance, power off the device and remove the battery......
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......
Use a soft, clean, dry cloth to clean any lenses, such as camera, proximity sensor, and light sensor lenses......
These suggestions apply equally to your device, battery, charger, or any enhancement...If any device is not working properly, take it to the nearest authorized service facility for service......
Do not store the device in hot areas...High temperatures can shorten the life of electronic devices, damage batteries, and warp or melt certain plastics......