testing of quality and market capability. However, the rapid change of battery technology nowadays plus the numbers of new competitor in the market, highly priced-competitive environment, may slow down the

markets. At the end of 2012, the SET Index closed at 1,391.93 points or a 35.76 percent increase, a record high in the past 16 years. The market capitalization was 11,964.47 billion baht, or a 41.01 percent