Monkey Boost (or Tower Boost in Bloons TD Battles Mobile) is a boost in Bloons Monkey City and Bloons TD Battles Mobile that doubles the attack speed of all towers on screen for 10 seconds. To purchase this, the player must pay File:BloonstoneIcon.png5 in Bloons Monkey City (10 on mobile) or File:Battle Energy.png1 in Bloons TD Battles Mobile. To prevent Monkey Boosts from stacking, this boost has a cooldown like an Activated Ability and has to recharge before the player can use it again. The countdown can be decreased in Bloons TD Battles Mobile using COBRA's Monkey Stim upgrade. When it is received as a bounty from the Monkey Knowledge Packs in Bloons Monkey City, you receive 5 free Monkey Boosts.