Originally Posted by
dougmc
9v batteries don't carry much energy. Either this light will not be very bright, or it'll have a relatively short runtime. Or both. And 9v batteries are kind of pricey to replace.....
I'm guessing you're misreading the post. 9V and 12V batteries (battery packs might be a better description) are available for radios. Alternatively battery holders are available that will let you build your own using AA cells. So that works out to about 2.8Ah which should run any 2-4W light for hours. Mine cost $10 and I used rechargable Aa cells already in-house.