Receive notification when battery 100% charged on iOS device
10 apps for full charge alarm :

http://appcrawlr.com/ios-apps/best-apps-full-charge-alarm

Sound an alarm when your iDevice battery has a full charge :

http://www.cultofmac.com/208576/sound-an-alarm-when-your-iphone-battery-has-a-full-charge-ios-tips/

And the associated google search :

https://www.google.fr/search?client=safari&amp;rls=en&amp;q=alert+battery+ios+full+charged&amp;ie=UTF-8&amp;oe=UTF-8&amp;gfe_rd=cr&amp;ei=808WVryqK6m40wXgt7HoBQ