You lose all the Data and Applications on the PDA
It looses data. That is why, it should always be backed up in your PC.
On average, your battery on a PDA will last about 4 hours, if your cell phone is a PDA then your time will vary due to the use from your cell phone.
A PDA battery is a special type of battery for smartphones. You can purchase them from any electronics store such as Best Buy, Future Shop and Battery Mart.
Most of the 4.0 and upward Android version does warn the need of a battery replacement after the current battery has had too many discharges.
Average Battery Life is about 4 Hrs.
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It actually depends on your usage as the more the battery is used , the quicker it discharges
When a lead storage battery discharges, the concentration of sulfuric acid inside the battery increases due to the release of sulfuric acid molecules into the solution. This process is part of the electrochemical reactions that occur during the discharge process in a lead-acid battery.
The larger PDA phones such as the Blackberry tested out as having the longest battery life.
A capacitor discharges over a period of time if there is resistance between its terminals, and instantaneously if the wires are just brought together. It's the same identical situation with a battery. When used to power a circuit with a reasonable rate of energy consumption, the battery lasts a while. But try laying a screwdriver across its terminals and THEN see how long it lasts.
It may affect his health...
As a battery is used, its electromotive force (emf) decreases due to various factors such as internal resistance, chemical reactions, and depletion of the chemical components that generate the emf. This leads to a reduction in the voltage output of the battery over time as it discharges.