Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: EnerSys (NYSE: ENS) popped 11% in intraday trading today, after the company reported quarterly EPS of $0.71, trouncing the $0.62 consensus estimate.

So what: Sales grew 21% year over year in the most recent quarter, with 18% growth from organic volume and 3% from pricing. EPS grew 58% year over year, compared to 32% in the prior quarter.

Now what: EnerSys simultaneously raised prices and increased volume, an unusual positive in a still-tepid economy. EPS growth appears to have returned to a healthy trajectory and accelerated in the most recent quarter. Though the stock is near a 52-week high, its reasonable P/E ratio of 15.5 times (based on an intraday price of $36.20) makes this a story worth researching.

Interested in more info on ENS? Add it to your watchlist here by clicking here.

Fool contributor Cindy Johnson does not own shares of any company named above. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.