No set answer to that, it depends on the size/capacity of the battery and what it's powering.
you can buy batteries at almost any store, such as Walmart, Radioshack, Walgreens, Domincks, leoch battery etc.
not long
batteries can be collected along with other outdated electronic items at designated areas like Radioshack and Rock UMC.
It all depends of the type of batteries and what you areusing them in.
about an hour
You can now buy two packs of batteries from Radioshack and get TWO FREE!
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.