Originally Posted by huy_lonewolf
With the One series, this is no longer an option and the battery life is indeed quite bad
It's not to be honest with you. The initial software release had an issue with battery life, but HTC have since patched via an OTA update.
At the moment, with relatively heavy use, I get about 30 hours before I'm asked to plug in the charger. With minimal use, I could probably get over 2 days. Thanks to the Tegra 3 companion core, you lose relatively nothing when the phone is idle.