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>Posted on 29 Jul 1996 at 21:56:31 by Peter N.R. Heseltine >As you know, the AUL lights mostly use lead acetate gelcells, because they >are cheap (well not very) and no partial charge problems. But they are >heavy suckers and bash the acrylic cases (costly). > >Do you have another, better solution?...while we mere airbreathing mortals >await the arrival of the electric arc light lamps, which are reputed to >be as revolutionary as cold fusion and as ephemeral. RSN. > >still in the dark, Battery technology is developing except maybe for NiCds which yield about the same Wh/kg now as they did when Saft first started making them in the fifties. (However, current ones are more reliable and last many more cycles). Panasonic is shipping NiMH with near Lithium energy densities and your own countrymen at the University of St. Andrews are working on cheap rechargeable Lithium Manganese chemistries that will measure in at 280 Wh/liter. For the record NiCds have no problem with partial charge and discharge even though they occasionally should be cycled "deeply". Didn't Mr. Farb describe a commercially available HID scuba lamp in this forum and even offer to buy it for interested parties ? Cateye has developed one for bicycle use and I think it's based on a Welsch-Allyn lamp. Sylvania I understand is making the low-beams for HID equipped luxury cars. These cars have a bluish sheen to them though. I'm not sure how that will work in water. Regards, John
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