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To: Maurice Winn who wrote (69200)	5/9/2008 8:40:05 AM
From: gg cox	Read Replies (1) \| Respond to of 74559

We agree, 10,000 cycles is huge when it comes to batteries. Also what is huge with VRB is it can be taken down by 80 percent from full charge every time with no degradation. Change 2 pumps every seven or eight years and cell stack after maximum cycles, and good again for another 10,000 or more cycles as electrolyte does not degrade. <<Half the energy density of lead acid batteries isn't necessarily a show stopper, though it's quite a disadvantage.>> It is not a disadvantage where weight and size of installation are not an issue..storing energy from the variable times the wind blows for wind farms,large solar, tide,wave installations,in my basement, garage, shed ...backing up telecommunications ...arbitraging the grid. I believe that a proper sized VRB could soak up billions of wasted watts from dynamic braking of locomotives ...now blown off to atmosphere as heat...GE is working on that now with its new series of locomotives...but always there is the bugaboo of number of cycles with existing battery technology..cost of replacement.Every downhill section of track, where a train anywhere, can be dynamically braked and energy stored for the next uphill is fuel saved...every railways largest cost. ge.ecomagination.com It's watts/k...check out the cycle durability..chart on the right..also self discharge rate..VRB's self discharge rate is negligible. en.wikipedia.org