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A downhole electrical power system provides long term electrical power in a downhole environment. In a described embodiment, a downhole electrical power system includes a power source which supplies electrical power to a well tool interconnected in a tubular string. The power source includes a volta

A downhole electrical power system provides long term electrical power in a downhole environment. In a described embodiment, a downhole electrical power system includes a power source which supplies electrical power to a well tool interconnected in a tubular string. The power source includes a voltaic cell.

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A downhole electrical power system provides long term electrical power in a downhole environment. In a described embodiment, a downhole electrical power system includes a power source which supplies electrical power to a well tool interconnected in a tubular string. The power source includes a volta

A downhole electrical power system provides long term electrical power in a downhole environment. In a described embodiment, a downhole electrical power system includes a power source which supplies electrical power to a well tool interconnected in a tubular string. The power source includes a voltaic cell. et al., filed Feb. 12, 2002. U.S. patent application Ser. No. 10/074,379, Taylor et al., filed Feb. 12, 2002. U.S. patent application Ser. No. 10/156,158, Taylor et al., filed May 28, 2002. U.S. patent application Ser. No. 60/391,070, Reeves, filed Jun. 6, 2002. U.S. patent application Ser. No. 10/188,668, Taylor et al., filed Jul. 2, 2002. Electrical Schematic and promotional material available from Zenion Industries, 7 pages, Aug. 1990. Promotional material available from Zenion Industries for the Plasma-Pure 100/200/300, 2 pages, Aug. 1990. Promotional material available from Zenion Industries for the Plasma-Tron, 2 pages, Aug. 1990. LENTEK Sila� Plug-In Air Purifier/Deodorizer product box copyrighted 1999.