I was running a capacity test on one of my strings and noticed it sagging down earlier than predicted. Did a quick voltage check of the batteries under load, and saw that the battery on the positive end was sagging badly. Having read that the positive side of the string shoulders most of the burden, I rotated that battery to the end, and put the strongest batter in it's place. String voltage was now much higher (almost 1 volt) - even though the individual readings on each battery were the same as before. The string also returned to a more or less flat discharge curve (measured at 5AH intervals), so my conjecture is that simply re-arranging the string would dramatically increase runtime. From the looks of this, the battery on the positive end of the string is the "long pole in the tent".
YMMV, but I thought this was interesting.
-Keith
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