So this is how it looks when Al Jefferson is halfway healthy and used to the optimum. The Charlotte Bobcats’ free-agent prize spent most of the past two months with nagging ankle injuries. He’s still not there physically, but he’s not running with a limp and he sure was effective Friday: A season-high 23 points and 12 rebounds in the Bobcats’ 92-76 home victory over the Milwaukee Bucks. Jefferson was tired of the lethargy the 8-9 Bobcats had demonstrated at Time Warner Cable Arena. They had lost five of their previous six in Charlotte, and Jefferson said he’d never before experienced a team with less energy at home than on the road. So Friday in the fourth quarter he personally blew up the Bucks, making 6-of-10 shot attempts for 13 points and adding seven rebounds. “I did want to take it upon myself,” to charge up the offense, Jefferson said. “I got hot.” Bobcats coach Steve Clifford believes there’s another level to be reached in how the Bobcats use Jefferson. He said the Bobcats can’t beat the best teams unless it gets him the ball even deeper in the post as the season progresses. Jefferson doesn’t disagree, but he’s also not complaining about his touches Friday.