Battery level shows yellow

The yellow battery is caused by low power mode. About iPhone Low Power Mode - Apple Support

See the tips here on maximizing battery performance. http://www.apple.com/batteries/maximizing-performance/#ios

-AJ

according to his profile he has an iPad. so I know iPads can't be in low power mode.

Johnnie DeHuff wrote:

according to his profile he has an iPad. so I know iPads can't be in low power mode.

Yes but he's asking in the iPhone forum and profiles are rarely up-to-date.

oh true.