- Duracell Plus lasts even longer due to more active particles. *These batteries have been specially developed for all the devices you use every day. *You want these devices to work just fine when you need them. *Consider, for example, the remote control, flashlights, a wall clock and your children's toys. *Retains energy for 10 years when not in use. *This battery is also known as MN1500, LR6, E91, 4206, 4006, KAA, AM3 and B15.