An air battery which is capable of detecting entering of water quickly. As described herein, techniques can be utilized by a Node B andor other network access point to compensate for differences between uplink slot boundaries and a power control command combining period associated with the uplink slot. Methods are also disclosed for using a video game device and an Internet access device in a bowler staging area of a bowling center. Finally, an alert can be programmed to activate when the tracking processor no longer can sense within range of the RFID reader an RFID tag having corresponding tag data stored in the data store. At easily accessible sites there are installed information terminals where users are identified and user data can be retrieved, especially in combination with an information system outputting user-specific information at selected places of the buildings, traffic routes and destinations. A system and method to map wireless LAN access points or hotspots are also provided.