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Comment: Re:How are these pebbles powered? (Score 4, Informative) 77 77

The glacsweb probes contain about 4 small batteries. They contain a realtime clock, and are in a minimal power sleep mode for most of the time. They wake up once a day to talk to the base station on the surface. The probes are designed to last for a year, and the first batch were deployed in August 2003.

Always look over your shoulder because everyone is watching and plotting against you.