On Wed, 29 Jan 2003 19:42:45 +0100 (CET), Heiko Rosemann wrote: > AFAIK, there is no battery-independent timer in the Ti-series > (otherwise I would have expected Ti to use it for their clock in AMS > 2.08) HW2 calcs have a cristal, otherwise the clock wouldn't be very accurate. The 83+SE has a cristal too.