LYCOS RETRIEVER 
Batteries: Power
built 287 days ago
Axion has developed and patented a next generation energy storage device that uses carbon electrode assemblies to replace the lead-based negative electrodes used in lead-acid batteries. This new device offers energy storage capacity approaching lead acid batteries and cycle life and power output characteristics approaching super capacitors in a low-cost device that recharges rapidly and is environmentally friendly because it uses less lead. Axion is currently producing pre-commercial prototype devices in small quantities at its lead-acid battery plant in New Castle, Pennsylvania. These pre-commercial devices use the same cases, positive electrodes, separators, electrolytes and manufacturing equipment that are used in conventional lead- acid batteries. The only notable manufacturing difference is the use of carbon electrode assemblies that replace currently utilized lead-based negative electrodes. Axion believes their planned products will be the only class of advanced battery that can be assembled on existing lead-acid battery production lines throughout the world with little or no change to production equipment and fabrication processes.
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In a series of tests* conducted by an independent laboratory, the new Panasonic battery was pitted against the AA size high-drain alkaline batteries most frequently used in digital cameras: Duracell M3 and Energizer e2. Using four different digital cameras from top manufacturers, pictures were taken continuously until the cameras ceased to function. The cameras' flash and LCD features were used, to consume even more battery power. The average number of shots taken using the PowerEdge batteries was 764; the average number of shots with the two premium alkaline batteries was 535.
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This one is a "rural legend"--batteries don't care what they sit on. It probably orginated from when batteries came in porous wooden cases. There are some truths behind this myth, though! All batteries do self-discharge over time when they are not being charged. If dust and dirt build up on the battery tops, sulfuric acid will carbonize the grime into an electrical conductor, acting like a short circuit across the terminals and quickly draining the power. Cold temperatures ... reduce available power from a battery. And thermal gradiants can reduce the life of large battery...this can occur when the air temperature around a battery is much warmer than the surface it is sitting on.
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NiCad batteries require a constant current charger; ie one where the current provided to the battery is fixed over the entire charging period. Such a charger can be something as simple as an unregulated DC power supply with a series resistor to limit the charging current into the cells. If the charger's voltage and the battery's desired charging current is known, Ohm's Law can be used to calculate the correct series resistor value. Because NiCads have a low internal resistance, proper charging can occur with several cells in series.
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This isn't the first time Apple has recalled its laptop batteries. In May 2005, 128,000 batteries made by LG Chem of South Korea were replaced due to possible overheating issues. That recall followed an earlier warning covering approximately 28,000 Apple Powerbook G4s.
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NOL, Sweden, Feb 8, 2002 /PRNewswire-FirstCall via COMTEX/ -- The Network Power Business Group of Exide Technologies (NYSE: EX) today announced its new contract, valued at 8.7 million euros, with the Royal Swedish Navy to provide propulsion batteries for its submarines. Exide Technologies is the global leader in stored electrical-energy solutions.
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