The Accel Charge is a suit expansion exclusive to Metroid: Other M. It is a small, yellow, glowing capsule that is one of the rarest upgrades in the game. It allows Samus to charge either of her two chargeable weapons, the Charge Beam (and in turn, Super Missiles) and Power Bomb at a faster rate.
Once all Accel Charges are obtained, Samus' Charge Meter will max out in less than a second.
Locations of Accel Charges
In Game Data