Default Q. battery question

Is anyone experiencing weird issues with battery before recharging? i had 2 days phone on batt and 3hrs screen on. It was at 53 % before i decided to charge. I fully charged it and now im losing 10% every hour even with phone on idle. Its weird cause every other charge will last a long time.
AT&T LG G2(Black)-SOLD
AT&T LG G-Flex-completely stock
"Its not the device....its operator error."