AA copper top batteries. Quality Duracell for long life.

Duracell Coppertop AA
1.5 Volt Batteries.
World's #1 Battery Brand (Based on Neilsen sales information (Jan 2010 - Dec 2011)).
Duracell Coppertop AA alkaline Batteries with Duralock Power Preserve Technology (guaranteed to preserve power for 10 years in storage) is the battery most trusted by the respected everyday experts. It provides "Power through the Unexpected."