For going ultralight or in the cold, the Energizer Lithium 2032 batteries are the way to go. They last considerably longer than the best alkaline batteries and weigh less. In cold tempertures the Lithium batteries last up to 7 times longer than alkaline.

Lithium batteries have a great shelf life, over 10 years! Operate well in extreme temperatures from -40° to 140° F. Energizer Lithium batteries are the batteries you can count on when it really matters.

Technology: Lithium (Single Use)
Volt: 3
Milliamperehours: 240
Height (mm): 3.2
Width (mm): 20
Depth (mm): 20
Weight (g): 3

*Also referred to as CR2032 or CR 2032