How to rollback from cyanogenmod 11 to stock firmware (Huawei Y300)?

Question

Android

I can't roll back. I downloaded the firmware that was when buying a phone (from velcom-Belarus), threw it on a memory card.
I tried with three buttons (power on + sound less + sound more), but after unpacking it writes Update Failed. Help me please. CM eats battery, applications slow down very much (even flappy birds when a minimum of applications is running, I'm serious). I will be very grateful.

Answer 1

I have the same phone, although it doesn't really matter. Firstly, different positioning eats the battery, there are 3 places: this is gps, this is google location service and wi-fi. Even if your wifi is turned off, it still scans the air all the time, this must be turned off separately. The battery flies in 4-5 hours. After turning off the positioning, the day works.
cm 10.1 works better than stock and you can roll back to it directly from android.
To roll back to stock, you need to find a stock image specifically for your bootloader that you installed. On w3bsit3-dns.com they are lying around, I myself rolled back once.

Answer 2

What recovery is worth? TWRP or Clockworkmod? In fact, the return of the drain is the reverse procedure for flashing custom. If you installed Cyanogen, then your bootloader is unlocked. Those. You need a stupid image of the stock firmware, then select it through Recovery and install it. If any of this does not work, then you need to clarify what, and look.