Battery More Durability After Update to Windows Phone 8.1 (Cyan Lumia)

It is the result of observations made in 5 different versions of Windows Phone, the WP 8, WP 8.1 DP1, DP2 WP 8.1, WP 8.1 DP3. WP 8.1 and Lumia Cyan. The results of these pegamatan shows that the smartphone is already updated to Windows Phone 8.1 (Cyan Lumia) battery is much more durable than other versions. This is proof that the Windows Phone 8.1 Lumia Cyan finals of the most efficient in terms of power usage.

Smarphone testing is used as the Lumia 1020 Using Windows Phone 8 OS, the smartphone battery has been below 50% for 15 hours after use. This is very different after the Lumia updated to Windows Phone 8.1 Cyan. With the use of the same about 15 hours, it turns out the battery is still at the 75% point.

It is very surprising happens when the Lumia using WP 8.1 Developer Preview 1 battery usage when using the OS looks very wasteful. Even the battery is below 25% in about 15 hours of use!

The conclusion from these observations is Windows Phone 8.1 is much more effective and efficient in terms of battery power usage compared to Windows Phone 8 Some features like Freeze might proclaim that we had helped to thrifty use of power by the OS.
The conclusion is that you should not use the WP Developer Preview version for everyday purposes. Developer preview version still has a lot of bugs which of course is not stable and efficient as the final version. The result you can see how wasteful use of batteries used by the OS. But if you want to do testing and curious about the new features in WP, there is no harm in using the developer preview version of the .
What is the response you about this observation? Are you WP also feels more efficient battery after upgrade to Cyan Lumia?