Seven Things to Consider When Choosing a PDA by Jason Kohrs
... Although real-world performance will vary among devices and how they are used, a battery with a higher mAh value will be able to hold a greater charge and last longer between charges. The general use of the device will obviously play a role in how long the batteries will last, and is a difficult number to provide with any certainty. Manufacturers may provide a figure on the normal life between charges, but this is most likely based on occasional use, where it is idling for a majority of the ...