E. Dimitrov wrote:

If I install the update and a problem occurs ... for example, as my colleagues run out of battery, what can I do then?! .... can I go back to the old firmware version in any way?

robertmackiey wrote:

And and update to the latest Android version so we can have dark mode as that should help save battery.

sams wrote:

robertmackiey wrote:

And and update to the latest Android version so we can have dark mode as that should help save battery.

It's not an OLED screen. Dark mode don't save battery life on standard LCD screens.

sams wrote:

robertmackiey wrote:

And and update to the latest Android version so we can have dark mode as that should help save battery.

It's not an OLED screen. Dark mode don't save battery life on standard LCD screens.

blackview_admin wrote:

E. Dimitrov wrote:

If I install the update and a problem occurs ... for example, as my colleagues run out of battery, what can I do then?! .... can I go back to the old firmware version in any way?

Hello, You'd better contact the professional after-sale department: support02@blackview.hk

Neville wrote:

blackview_admin wrote:

E. Dimitrov wrote:

If I install the update and a problem occurs ... for example, as my colleagues run out of battery, what can I do then?! .... can I go back to the old firmware version in any way?

Hello, You'd better contact the professional after-sale department: support02@blackview.hk

I did...but they never answer their emails

Neville wrote:

blackview_admin wrote:

E. Dimitrov wrote:

If I install the update and a problem occurs ... for example, as my colleagues run out of battery, what can I do then?! .... can I go back to the old firmware version in any way?

Hello, You'd better contact the professional after-sale department: support02@blackview.hk

I did...but they never answer their emails

cibermarck wrote:

Hi, i haven't seen the topic in a long time. I solved my the problem with the battery. 

When unboxing my cell phone i installed the applications with the backup to google, the solution was do factory reset and install all applications and configurations manully, one by one.

Now my battery lasts up to four days, when I use it little.

cibermarck wrote:

What version of android does your cell phone have? 
I have carried out different tests to find the problem, when I went to sleep the phone had 91% battery, I left it in airplane mode and after 6 hours without using it I had 70%, check the history of use of the battery but it does not record any application. I use Greenify app to keep apps sleeping. Also disable all smart assistant functions. I have always used only the original charger.

How long does it take for your phones to charge from 20% to 100%?