Battery Life & Charging
Dell's other biggest accolade for the Latitude 7400 2-in-1 is its battery life, which can reach up to 24 hours on a charge (with base-level specs and a 78 WHr battery). That gives the notebook the longest battery life for a 14-inch 2-in-1 right now, according to Dell. Battery options include a 78 WHr, six-cell battery with fast-charge capabilities; a 52 WHr, four-cell battery with fast-charge capabilities; and a a 52 WHr, four-cell battery without fast charging.
For the models configured with fast-charge batteries, Dell says a charge of 30 percent can be achieved in 20 minutes. Or, you can get up to an 80 percent charge in an hour.