Product Code :DU03792 Manufacturer Code : 75051955. Duracell Ultra Battery Pk 4 AA 75051955.Why is it that your torch always runs out of power just when you need it most? If only someone could invent a battery that told you when it was starting to run low. . .Luckily for us that’s exactly what Duracell have done! Not only are their Ultra Power batteries packed with energy that lasts for ages but they also use Duracell’s trademarked Powercheck technology. This lets you see how much juice is left simply by touching your thumbs to each end of the battery. So you need never get caught short again!