Turbo Charge Ability: increase attack speed to hypersonic for 10 seconds.
~ BTD5 Flash Description
Ability: attacks incredibly fast for 10 seconds.
~ BTD5 Mobile Description
Ability: attacks incredibly fast for 8 seconds.
~ BTD Battles Mobile Description
Turbo Charge is an upgrade to the Boomerang Thrower that made its debut in Bloons TD 5. It is the final upgrade on Path 2, costing $2550 on Easy, $3000 on Medium, $3240 on Hard and $3600 on Impoppable and adds the Turbo Charge Ability, which increases the firing speed of the tower by 5x (hypersonic) for 10 seconds. It is recommended to combine the Glaive Thrower upgrade along with this upgrade; not only will the Boomerang Thrower pop more bloons at once, it will also increase its attack rate even more.
This ability has always been a good way to defend against a lot of rushes (such as the notorious RRROD), and has become even more reliable thanks to it now being able to deal with camo bloons. However because of this it became very hard to try to kill a player if they brought the Boomerang Thrower in their loadout since they could easily place down a 2/4 Boomer and easily destroy any rushes. Overall this upgrade has been buffed as it's better overall at defending rushes compared to the initial release of Bloons TD Battles Mobile.
Turbo Charge now grants camo detection to the Boomerang Thrower while the ability is activated.