Consider that these are used in solar power/alternative power installations, they don't use just 6 cells in those applications so the outlay in cash is much more than $50. As far as if they work, there are many articles online describing their use under 'real world' applications and they have shown they do work. BTW, if you search google's usenet newsgroup search engine using "hydrocaps", then sort by date, then go to the end, you'll see a posting by someone from 1992. Well before the 2000 article about this new 'invention' called a catalyst recombiner for lead acid batteries! Lastly, you don't use Evian to refill lead acid batteries. Distilled water only! (I know you were just joking). Dave (who used to have 4KW worth of solar panels on my roof feeding a 12V 880AH lead acid battery pack (48 battery caps!) ----- Original Message ----- From: "David VanHorn" > One 12V battery's worth of caps is $50. -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu