The Evolta concept is a combination of “evolution” and “voltage” (power) - how our technology has grown to become pre-eminent in the industry. Evolta has the ultimate long lasting energy & consistently outperforms our competitors' premium products in commonly accepted independent performance tests. Anti-leak protection Panasonic Alkaline cells feature advanced Anti-Leak Protection that suppresses gas buildup when a battery is over-discharged or stored for a long period. Less pressure means less chance of structural failure and rupture, and protects your valuable devices from damage.