[HTC One] Anyone else with significantly improved battery life

Recently I got a minor update from HTC for my international One (4.2.2). And all of a sudden I get a massive improvement on battery life. Prior to that update I got the usual 1-day usage with Spotify live streaming some hours over LTE, Blinkfeed, 2 Youtube clips a day from Jimmy Kimmel, the occasional Internet surfing and the weather.

Now, I get two days out of my phone with the same user behaviour. Anyone else noticing this? Or is it just me?