Battery Android M will have a new feature called doze. Doze will detect if the device has not been touched or moved for a long period of time and the device will then sleep and thus use less battery. According to Google, devices with Android M last up to two and a half times longer than Android L.
In addition to this, Android M will support USB Type C charger is coming to Android M, although Google has not given details of devices which will support
See more at: http://indianexpress.com/article/technology/tech-news-technology/android-m-at-google-io-2015-permissions-to-android-pay-all-the-new-features/#sthash.hAsp35QE.dpuf