A good battery will easily last 18, and you would normally get 27 holes out of one. However, if you conserve power well you could get 36 holes.
not long
normally 8 hours
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.
A set of NiMH AAA batteries can last roughly a month on a full charge if they are not being used at all and are simply allowed to sit around. In devices such as cameras and small pda's where rechargeable batteries are best used, the batteries can last nearly as long as normal alkaline batteries on a full charge. Exact times depend on the capacities of the NiMH batteries. A charge lasts long enough for a camera to be used normally for several days and hundreds of shots. As long as the NiMH batteries are not allowed to be idle and self-discharge, the life of a single charge is almost as long as a full alkaline battery. The life of the battery itself can easily be several years. NiMH batteries don't need much maintaining and can last for hundreds of charge cycles.
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.
Banknotes normally last for 1 to 3 years.
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.