The Anton/Bauer Performance Series Quad Charger V-Mount allocates the most power to the highest-charged battery first and subsequently to the next most charged ones, ensuring that you'll have a fully charged battery as soon as possible. The process is similar to a champagne glass pyramid where the top-most glass overflows into those below it. The Performance Series is 40% more efficient than previous Anton/Bauer chargers by employing faster processing, using a smaller transformer in the power supply, and drawing less amps.