Listen up: We tested 15 AA batteries—the type ... the cycle until the batteries die. Battery life was 7.3 hours for an Energizer, 6.8 hours for a Duracell, and 4 hours for a Toys "R" Us battery.

Throw in the fact that today’s Duracell discount is an Amazon low price and it just gets even better. Other than that, it’s as simple as answering the question of whether or not you need AA ba ...