Shares of EnerSys (ENS) have been strong performers lately, with the stock up 14.2% over the past month. The stock hit a new 52-week high of $141 in the previous session. EnerSys has gained 50.2% since the start of the year compared to the 6.8% gain for the Zacks Industrial Products sector and the 10.1% return for the Zacks Manufacturing - Electronics industry.What's Driving the Outperformance?The stock has a great record of positive earnings surprises, having beaten the Zacks Consensus Estimate in each of ...