The developer and unlocked versions of the HTC One M8 are now receiving an update that enables the device’s Extreme Power Saving Mode. This feature extends the phone’s battery life by disabling all but the essential services, shooting users out of the standard interface into one that provides access to phone calls, text messages, email, calendar events, a calculator, and nothing else. This feature did not ship on the HTC One M8 out of the box here in the US, but updates are turning that situation around.

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HTC One M8 Developer And Unlocked Editions Get 1.54.1540.9 Update With Extreme Power Saving Mode, Other Enhancements was written by the awesome team at Android Police.
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