I have noticed about a 30% reduction in battery life over the last week. Both phones were updated to 9.2 when it came out. I did agree to the carrier update about a week ago. Could a carrier update be causing poor battery life? I am not using either phone more than normal. Battery Usage doesn't show anything unusual aside from Phone (low signal). I am on Verizon and get poor reception but it was like this both before and after the carrier update.