p.s., If this really does get up to 12.8 hours on a charge, you might wonder what my concern is. I think I mentioned I will be out in the field for an extended period of time, about 2 weeks at a time. Stan On 3/17/2015 8:45 AM, Stan Gorodenski wrote: > Dwight, > You are correct about not needing a super computer to do astronomy in > the field. I bought this for other reasons besides astronomy. Although I > have never tried seeing how long it will run on the battery alone, the > ad in B&H when I bought it says it has "9-Cell Lithium-ion providing up > to 12.8 hours per charge (94Wh)", whatever 94Wh means. The battery is > sort of an odd design. It sticks out about an inch beyond the laptop, I > guess to fit in all the 9 lithium cells. > Stan > > > -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.