If you have had this phone for less than 2 to 3 weeks, give it time to optimize. My phone's battery life improved significantly at almost 2 weeks exactly.
But 41 mins within 9% of the battery is about 4.5 mins per 1%, which would give you 7.5 hours usage by the time the battery drains. Obviously this depends on the type of usage, but it sounds like it's operating just fine.
*edit* poster above beat me to it