I recommend version 1.7 for IOS 6 users.

I am using IOS 6.1.4 at iPhone5 64GB. This is a useful app but versions 1.1 and 1.5 were always showing notifications and advertisements. In this new version (1.7), they fixed notification problem. I recommend version 1.7 for IOS 6 users.

CÜNEYT KALABALIK about Battery Toolkit - Power Charge Life & Unit Convert, v1.7