One thing the Libby case presents a good teaching point for is that the ability of a judge to
consider uncharged conduct or crimes (or for that matter acquitted crimes) in sentencing is one of the main drivers of uncertainty in the Sentencing Guidelines.
Consider that a normal car battery is rated, say, 61 A · h, then even if your alternator could poke it with 50A for a whole hour, it'll still be left
uncharged; in reality, 20A charges are often called «rapid», 10A is «fast», and the normal charges are more likely to be just 6A to 8A, which means that a fully discharged battery of a compact car will take something like at least 8 hours to reach the full charge!