Multi-Drain has a 7-year shelf life combining Low Drain (LD) and High Drain (HD) batteries of the same voltage into one battery Ground shipment only 33% lighter weight than Alkaline batteries Excellent low-temperature performance For electronics around the house like keyless entry electronic books and glucose monitors energizer goes beyond the basic battery sizes to bring you the ones you need. Performs in extreme temperatures from -22f to 140f. Holds power for 8 years when not in use.