E-Recovery Tanks increase the amount of health Samus can restore with the Concentration technique. Initially, Samus can restore one Energy Tank with Concentration when her health is critically low. Each E-Recovery Tank increases that capacity by an additional Energy Tank. Three can be found in the game, together allowing Samus to recover up to four of her Energy Tanks.
Samus' upgrades | Missile locations | Energy Tank locations
Energy Part locations | Accel Charge locations | E-Recovery Tank locations