In cases of real emergencies, most emergency lights are pretty much useless if you don’t have the required number of and type batteries to power them up. You can consider yourself lucky if you come across sealed packs of double As and triple As as you stumble around in the dark, but if what you’ve got is a set of batteries in mixed sizes, then you’re pretty much doomed.
Panasonic was well aware of this problem, which is probably why they came up with the BF-BM10 flashlight which is also known as the ‘Any Battery Light.’
I think the name pretty much says it all. You can use any size of 1.5 volt battery that you can find lying around in your house, from the tiny AAAs to the huge D-sized battery. The flashlight uses one battery at a time, and you can expect up to 86 hours of operation if you insert four brand-new batteries into the slots.
Panasonic was inspired to invent the flashlight after demand for portable torches soared after the devastating earthquakes in Japan last 2011.
At this point, the Any Battery Light will only be made available to the Japanese market, and will go on sale later this month for 2,000 yen (~$24 USD).