
I have two dual AA Maglite flashlights that needed spare bulbs as a backup and one active bulb that blew out. I bought two packs and after seeing how much brighter one flashlight is compared to the other I switched the other bulb in the flashlight that was still working because they are so much brighter. Both flashlights use new AA lithium batteries, which have a higher initial voltage than alkaline AA batteries. I don't know if this affects the durability of these lamps or not, so I cannot comment on this aspect of these lamps just yet.

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