Author: Frank Schneider
Date: 21:31:39 12/04/03
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Hi, thanks, cool report! Frank On December 04, 2003 at 23:32:58, Mike Byrne wrote: >As one could imagine, chess programs are killers for PDA batteries. In fact I >reccomend that if you do play chess on the PDA, turn "pondering off". But chess >players also know that pondering "on" lets the PDA play better chess as it is >contemplating a response on your time. > >I have owned 3 PDA's and everyone , Palm, Ipaq and DELL , would generally last >between 3 and 5 hours going full speed while playing chess and pondering on >your move. I think my Palm Vx lasted about three hours, my Axim will last just >about 5 hours. But these are maxed out times - there would be almost no battery >available at the end. With pondering off you would be able to play for maybe >7 hours on an Axim and still have a some battery life left. That is assumimng >you are taking the same amount of time as the PDA to make your move. > >Recently I purchased some NiMH batteries for my digital camera. I also bought 4 >extra NiMH batteries to use in a device call a "battey extender" (~$8 on eBay) a >little pocket size device that holds 4 AA batteries and plugs into My Dell Axim. > These 4 batteries (2100MA)cost about $10 and rechargeable. Total cost $18 (not >counting the charger). > >I fully charged the PDA, and the 4 battteries - plugged it into the Dell Axim , >set the device so that there was no dimming of the screen at all and so that it >would not power power down until the batteries ran were dead. I started up >Pocket Chess Genius, set up a position, and turned analysis mode on. The unit >was set to use full consumption of power until the PDA batteries and the >extended batteries ran out. I then left it running, periodicaly checking the >unit from time to time to ensure itw as still running. I also might add that I >set the unit at 590 Mhz - almost 150 faster (and also 150 % more power >consuming) than the specificed 400 Mhz teh untiwas designed for. > >The results: > >After 10 hours, it was still running, still computing with full brightness. I >checked the battery in the PDA and it was nearly at zero. At this point I was >fully satisfied with the performance and ended the little experiment. The >battery extender display an impressive amount of utility for relatively low >cost. (Extra Dell batteries run nearly $60 I believe).
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