Because this continual change, electrical contact
between the nickel oxide granules and the grid pockets was
reduced, thus increasing the internal resistance cell and
lowering its electrical output. During
charging and discharging, these electrodes would swell and
shrink. The battery leaked because the caustic
electrolyte ate through the solder along the seams the
battery's outer steel can. Unfortunately problems soon appeared
in this product. While and his
men easily eliminated the leaks switching from soldering to
welding the seams the battery's outer can, the capacity
problem proved far more vexing. With
characteristic determination, Edison set about finding the bugs
which caused the leaks and the capacity loss.VIII-17
rapidly ahead manufacturing and marketing this new product.^5 Eventually, traced the
capacity problem the nickel oxide electrodes. Nevertheless, the Type sold
well, and 14,000 cells were installed electric cars and
23
trucks 1903 and 1904.
Edison found that this new battery, which dubbed the Type E,
performed better than most the competing lead-acid cells,
but cost more manufacture. Over the next five years,
Edison undertook thousands additional experiments to
identify the cause this problem. Even worse was the substantial drop
in electrical capacity the battery after period use.^
As customers reported these difficulties, Edison realized
that had not fully tested his new battery and recalled
all the defective cells November 1904. Edison overcame this
