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On Mon, 6 Mar 1995, Randal Whittle wrote: > The good news is that perhaps farther into the future there is > a truly *fascinating* battery technology coming available (no, I'm not > talking about Zinc-Air). Tentatively, they were calling it > "Lithium-Polymer". The beauty of Lithium-Polymer is that it not only > has a higher current density, but is *far* more flexible in terms of > its form factor. Current battery technologies are *very* dependent > on arranging the various cells in a particular physical way. Polymer > will do away with that necessity, allowing very odd and strangely-shaped > batteries to be available, and making things like notebook-computer > design much more flexible as well. What about the lead acid batteries that IBM first used in the original Thinkpad 500 models? I remember that in PC Magazine's battery rundown test which gets about 1 hour 45 mins on the 755CE, the lead acid battery in the 500 lasted for 9 full hours and thats in a test to rundown the battery as quickly as possible. Unfortunately as we all know IBM discontinued the lead acid battery after only a few months and recalled all the 500 models and replaced them with standard Nickel Metal Hydride batteries with standard battery life of between 4 and 5. The vague reason given at the time was that the battery would refuse to accept a charge suddenly after only a few months of use. I don't know about other people but I would gladly accept a battery that lasts only 6 months if it gives me 9 hours per charge. Josh Hosseinoff hosseino@yu1.yu.edu