For going ultralight or in the cold Energizer's AA Ultimate Lithium batteries are the way to go. They last considerably longer than the best alkaline batteries and weigh 40% less.

To get the same burn time out of standard headlamp you would have to carry 3 times the weight using alkaline batteries. And in cold tempertures the Ultimate Lithium batteries last up to 7 times longer.

Ultimate Lithium batteries also have a greater shelf life, over 10 years!

Operate well in extreme temperatures from -40° to 140° F.

1.5 Volt, 2900 MilliAmpHour capacity.

Energizer Ultimate Lithium batteries are the batteries you can count on when it really matters.

*This item contains materials that are restricted to ground shipping only. Sorry, no air shipping. Cannot be sent to Alaska, Hawaii, APO, FPO or international addresses. Category ORM-D.