ST. LOUIS, Mo. — Energizer has made improvements to its Ultimate Lithium and Energizer Recharge AA and AAA batteries. Energizer Ultimate Lithium batteries now hold power for up to 20 years when not in use. Energizer says that no other AA or AAA battery holds power longer, making Ultimate Lithium ideal for high-drain devices. Energizer Recharge AA batteries have also been infused with extended-life additives for a battery life of up to five years.