SPONSORED LINKS
In message Mon, 6 Mar 1995 23:11:26 -0500 (EST), Joshua Hosseinoff <hosseino@yu1.yu.edu> writes: > 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 I think that's more a function of lower power draw by the 500. The TP750 mono got 5 hours 30 min in the same test (I was averaging 5h 10m before I bought a memory upgrade). Same battery as the 755CE. At work I run into a lot of battery energy density charts for autonomous subs and per unit weight lead-acid is near the bottom. Progressively better are NiCd, Alkaline, NiMH, and Li in that order. ______________________________________________________________________ |\ _____________________________________________________________________\ | | | | | John H. Kim "Um ... no." -- Outfielder Darryl Strawberry's | | | jokim@mit.edu hesitant reply when asked by a judge if he | | | jokim@uni.uiuc.edu had taken drugs in the past few days. | \|______________________________________________________________________|