It depends on the laptop. If you have a small laptop like an EEE PC you could see 10-12 hours. If you have a mid-range laptop with a power-efficient processor you could get 6-8, and if you have it in a gaming rig laptop you may see around 3 hours.
Assuming the same voltage is applied to each AH rating in the question, 8800mAh is more than 6600mAh. If it is stored in a battery, the 8800mAh battery might be bigger or might be made with improved technology.
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 you divide the 5000 mAh by the current used (in mA), you will get the number of hours the battery will last.
Duracell batteries typically last longer than other battery brands.
About eight hours