I bought a flashlight that came with two spare bulbs, that say on them
2.4v. So does the one in the flashlight. The flashlight uses two
batteries in series, and I thought that should be 3 volts. Is this
"normal" or is the bulb going to burn out quickly? Or what? :)
Flashlight bulbs are normally rated for about 1.2-1.25 volts per cell,
so as to achieve full brightness when the batteries are in, in my words,
"average condition". There is also some consideration for "average"
internal resistance of the batteries.
- Don Klipstein ( email@example.com)
Agree: With ordinary/regular batteries by the time the electricity
comes out it will have encountered some internal resistance within the
battery itself. So over the life of the battery the voltage will be
somewhere below the nominal 1.5 volts per cell, (3.0 volts for two).
Very large batteries may have lower voltage dop, especially on small
For two AA cells, use a PR-4. That will give you reasonable service.
For two C cells, PR-4.
For two D cells, most lights use PR-2, though the PR-4 will work fine and
give longer battery life. But the PR-4 is not quite as bright.
Yep, the voltage ratings aren't perfect.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.