No set answer to that, it depends on what it's powering
This is not necessarily true. Usually the brand of battery is not as important as the technology used. An alkaline battery should last longer than a regular carbon battery, no matter what the brand.
a car battery last for about 3-5 years
As long as the battery is kept charged then it should last 3-5 years.
a panasonic triple a battery last about 4 hours nonstop.
about a year.
Forever.
8hrs
No the battery is built in but should last a long time.
A Sanyo phone battery last just about as long as any other battery. Most batteries are manufactured by just a few different manufacturers, and then rebranded.
if it is for a flashlight, it will be 22 hours
If you divide the 5000 mAh by the current used (in mA), you will get the number of hours the battery will last.
About eight hours