Sony’s power management software Stamina Mode is one hallmark feature of the Xperia Z and its siblings marketed by Sony. With capabilities of extending battery life by more than four times and being a native piece of software to the 2013 Xperia lineup, it’s with no wonder that owners of earlier Xperia devices would love to get their hands on this piece of goodness.
So for those with the Xperia S, SL, Ion and Acro S, the anticipation is finally over. XDA Senior Member Aeron sagar has ported Stamina Mode over to the aforementioned devices. Compatible with a deodexed Jelly Bean firmware and with either a locked or unlocked bootloader, users must download the provided zip file and move each file to their corresponding directories in order to install Stamina Mode. Simple.
But how does Stamina Mode work? Well it actually operates quite similarly to some 3rd party battery saving apps out there on the market. Once in standby mode, Stamina Mode kicks in and blocks all data traffic and background activities from waking up the system. This means that apps do not synchronize for new data, messages, and notifications. There are also settings for users to customize the list of apps affected by this, as well as turn on location-based WiFi, a function that will automatically activate WiFi once the phone is within proximity of a saved network.
So if you’ve been waiting on trying this out on your 2012 Xperia device, make sure to check out the original thread for more information and further discussion._________