low battery alert?

[anon(631531)]

Does anybody know of an app that will give you a low battery alert, when you set it to the percentage of your choise? Wife keeps leaving her 3GS in her pocket book until it runs down to almost 0%. Her phone is not jailbroken.

 

[anon(631531)]

Found it in Cydia. It's called Power Alerter. Gives you your own ringtones as low battery alert, or fully charged battery. Now, if i can only get my wife to let me jailbreak her iPhone.