 Energizer Holdings Inc. shares ENR, -7.02 jumped 5.6 in premarket trade Monday, after the battery maker blew past earnings estimates for its fiscal first quarter. Energizer posted net income of 60.0 million, or 83 cents a share, for the quarter to Dec. 31, down from 67.1 million, or 91 cents a share, in the year-earlier period. 