From: ohland@charter.net   
      
   Rick, what would be the minimum rated Watt-Hour for the battery pack?   
   180W over 10 seconds?   
      
   Assuming a 12v battery pack...   
      
   Louis Ohland wrote:   
   > 9.25" (L) x 1.75" (W) 1.875" (D)   
   >   
   > This sounds better...   
   >   
   > Louis Ohland wrote:   
   >> My brain hurts from the charge rates for NiCd.   
   >>   
   >> I must purify myself in the waters of Lake Minnetonka...   
   >>   
   >> "1290 pack (12V, 9Ah)" now here's an actual item to look for, and I   
   >> >ASS U ME< there should be plenty of erudite discussions.   
   >>   
   >> Rick Ekblaw wrote:   
   >>> The key here is that the battery pack needs to put out 180W of power   
   >>> for 10 or 11 seconds, then it gets recharged to be ready for the next   
   >>> power dip.  That's a poor usage case for NiCD, which suffers from the   
   >>> memory effect if you don't discharge slowly and most of the way   
   >>> towards full discharge, but lead-acid can dump out power quickly and   
   >>> cycle often, though doing that lowers the pack lifetime, it would   
   >>> probably need to be replaced every 3 years or so.   
      
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