Energy
- 403
- Windpower Photos
- Photographs from wind power projects: land and offshore based. Photos from HVDC-light project on Gotland, Sweden. The site is in Swedish, English and German
- 404
- Energy Hack
- Blog by Danish freelance journalist Hans Henrik Lichtenberg about alternative energy. Focus is on personal experiences, new inventions and DIY-projects for households.
- 405
- Energy Insight
- News and information covering alternative and renewable energy including solar, wind, geothermal, ethanol, biodiesel, and tidal, as well as related technologies. Also contains a archive of previous articles.
- 407
- Hydrogen Cars and Vehicles
- Contains information about vehicles and building of supporting infrastructure including production, storage and distribution. Contains categories and related links.
- 408
- New Energy and Fuel
- Information for energy supplies, sources, methods, fuels, new technologies, and conservation.
- 409
- Sun and Earth Energy
- A blog reviewing alternative energy technology and policy worldwide. Contains projects and links to do-it-yourself resources for wind and solar projects.
- 410
- Technology For Life
- Covers stories related to development and renewable energy focused on Spain and the United States. Also contains statistics and related links.
- 411
- Ancient Inventions
- Describes the history and operation of the Baghdad Battery - (about 250 Before Common Era).
- 413
- Battery Education
- Discusses battery technology, uses, and technical elements, with a focus on iPods.
- 415
- Battery Technology Comparison
- Rechargeable. Compares AA cells, a few larger batteries, and supercapacitors.
- 416
- Battery University
- Analyzer and charger maker offers web version of book about batteries and how to charge them.
- 417
- Choosing and Using Nickel-Metal-Hydride (NiMH) Rechargeable Batteries
- Provides brief history of rechargeable batteries, characteristics, how to choose and store them, recharge methods, and memory effect information.