(→Double XP: XP boosts are multiplied by a double XP event. This has been verified via the total bonus XP indicated at the end of each match. Using a 100% boost during a double XP event, the indicated bonus experience equals 75% of the total.)
Double XP is awarded to players on specific dates announced by DICE. They may be available for everyone or exclusive to those who are Battlefield Premium members.
In Battlefield 3, Double XP only doubles the player's overall rank progression, not class or vehicle type progression.
In Battlefield 4, while Double XP is active, XP boosts can be used simultaneously with it, and the boost amount will be multiplied. (i.e., Double XP (100% boost) + 50% Boost = 200% total boost). This can be verified at the end of every match when the total bonus experience for the round is displayed (i.e. for the previous example, if the total round experience was 9,000, the total bonus experience will indicate 6,000).
XP Boosts in Battlefield Heroes increases experience gain is stackable with other XP Boosts. Boosts of the same type do not stack but extend their duration.
XP Boosts allow players to gain more experience during play and can be purchased for limited time use in Battlefield Play4Free.
XP Boosts in Battlefield 4 are obtained randomly through Battlepacks. Once obtained, a boost can be activated in the pause menu and will stay active for the next hour of gameplay in a multiplayer match. There are currently four types: