[Vwdiesel] Battery source, Seattle?

[Andrew Buc]

If my VW Quantum TD starting problem turns out to be a tired battery  
(cranking speed does seem subjectively a bit slow), then I'll be in  
the market for a replacement. Any recommended brands of batteries, or  
places to get batteries, in Seattle? As it happens, I live close to  
Schucks in Ballard, and I believe they test batteries. Is the test  
accurate, or just a marketing tool? Thank you.