Functions the similar way as the Accumulator, but instead of charging by killing enemies, it charges primarily by dodging enemies and their attacks (bullets/lasers). The closer your spacecraft grazes an enemy or projectile, the larger the charge is gained to the booster. To activate the booster, quickly double-press and hold the fire button. The booster will continue to accumulate charge even while active, as long as you keep dodging incoming enemy attacks.
HUD icon is literally a signal bar and a battery on its right side. The signal bar indicates how close you managed to graze at an enemy or a bullet/laser. There is a 5 second cooldown (15 second for bosses) before the booster can gain charge again after dodging the same enemy/projectile.
1* = 1-bar charge
2* = 2-bar charge
3* = 3-bar charge
