Economical, general purpose 1.5V D size alkaline battery with a high energy output that is reliable, with a long shelf life, and good low temperature performance. Duracell Plus now has longer life compared to previous Duracell Plus batteries; ideal for everyday use.Duracell's DURALOCK technology means these batteries are guaranteed to stay powered for up to 10 years when not being used. This huge leap forward in battery technology has been made possible by improvements in the purity of ingredients and upgrades to the construction of the battery cell meaning less power is lost when in storage.