9-cell batteries can last a long time depending on what you are doing on your PC. basic gaming: 2.5 to 3 hours of life. reading emails and sending emails on a battery that was fully charged can last much more longer. the life of the battery also very much depends on the kind of computer you have, the power plan, and how high the brightness is on the pc.
not long
It all depends of the type of batteries and what you areusing them in.
about an hour
Lithium batteries can last one and-a-half to two times as long as NiMH batteries.
Rechargable batteries will not last as long as normal AA's, but, of course, can be recharged, and should last over a year.
The batteries in an Xbox 360 controller are rechargeable. When full charged, they will last several days. The batteries themselves are meant to last the life of the controller.
The batteries are over the counter watch batteries and they last twice as long as the battery put into the walker
Batteries should be changed every 6 months. Some can last up to a year.
Well they run on batteries so they kind of last forever if you replace the batteries.
7 hours
one minute
most battery last five years