Energizer

"Hero earns XP 50% faster while in Energizer's radius. Cooldowns for abilities of water Monkeys in the radius are halved."

- BTD6

Energizer is the final upgrade of Path 1 for the Monkey Sub in BTD6. It makes Heroes earn XP 50% faster, along with reducing cooldowns of all water Monkeys in the radius by 50% (doesn't stack with Bloontonium Reactor). It also can pop bloons and remove camo, like its preceding upgrades.