It'll be either on the top or bottom or sunken in just behind it, you'll need a torch to see it properly. But sounds like your battery one has been triggered hence the white, so chances are that one has also.
// LG G3 (D855) // Stock // Stock //
// HTC One (M8) // GPE Stock // Stock GPE//
// Nexus 7 (flo) // Android L // Stock//
S3(White) > M7(Red) > Note 3(Black) > Nexus 5(Black) > M8(Gunmetal)/LG G3 (Titan Grey)