I have not had problems with previous phones when it comes to battery life. (batteryuniversity.com)
The V10 is like previous phones with fingerprint scanners in that you actually have to wake it before using your finger to unlock it. (androidcentral.com)
On previous phones, you had to hold the phone at just the right position, avoid certain lighting, and take off your glasses every time you wanted to use the iris scanner. (digitaltrends.com)