Energy as in how ?
Hp?
Or
Electrical I can answer both of them ..
If its in hp it can be alot of things
Oil is old
Transmission fluid is old.. It can be your spark plugs but i doubt it its an 05 ..
if its electrical your battery is messed up or your alternator is not functioning as it should be if this is the case then you should go to autozone so they can check the alternator for free ...