The spare battery can be easily at any time, assemble or disassemble during operation, below the Vaio Pro 13. The locking takes place via two slide switches. First, however, 13 a cover must be removed at the Vaio Pro, which takes place on the battery for storage. The battery is barely visible from the outside, however, tilts the Vaio Pro by a few degrees forward. Although this the writing posture is improved, the limited opening angle of the Vaio Pro but further shortened, which is useful in larger users cause problems because you have to then easily look from above on the screen. The charging management of the Vaio Pro is designed well. Only the spare battery is completely drained and can then be removed, then is only switched to the built-in battery. The battery fits in the attached state with the Sony notebook bag for the Vaio Pro. 13