why is Z220 battery so bad

This is so true! This phone really consumes a lot of bttery evenn in stndby mode. I suggest you to buy a power bank. It will be a great help.

Hi,

I found the Acer Liquid Z220 phone gets warm very quickly, only after a few minutes of calling or video streaming. Does this fact still make it to be a good phone?

To turn off data, from the quick settings drop down (swipe down twice on main screen), you should have a small triangle which has the name of your carrier under it.  If you press it, it should give you the Cellular Data screen, which allows you to turn it off on the top right.

If that doesn't work for you, you can go into Settings, and from there you should have something on the top portion called "Data Usage" or something like that.  From there, depending on mode and os you have, you may have to select the tab for your carrier/sim card, and one you have that, you should be able to turn "Cellular data" off from the top right slider.

Keep in mind that some apps are quite power hungry... Recently on one of my other phones (old moto G), and a recent update to ES File Explorer, I noticed my battery was draining nearly twice as fast as before.  Tried to reboot, etc.. and nothing.. Eventually, I uninstalled ES File Explorer, and everything went back to normal.. I since switch to Solid Explorer Classic which does not consume any crazy amounts of battery.. After trying it for a while and it worked perfectly, I actually decided to switch to the Solid Explorer full and purchased an unlock key for $2 (to support the devs) which was worth it.  ES File explorer was perfectly fine up until that last update (over 2 years with no issues  on various devices).  But they've been adding all sorts of bloat into the app lately, that I just gave up on it.  And many bloat features you can't even turn off.  They have destroyed a perfectly good app which was simple and effective.  And the ads got really intrusive.  I refuse to support anything that goes overboard on ads.  I understand some ads to support the devs, but there is a limit.

Under Settings--> battery, have you checked to see if there is any hint of some app hogging to much power ?  It is not a 100% accurate depiction, because very often some apps go through various API and use resources via other modules, but it is a good start for some obvious items.

Also another is to disable the adaptive brightness control which handles the screen brightness.  Powering the screen is often one of the most energy consuming activity.  I often disable it, and depending on the phone, I just manually set it to about 1/3 the brightness.  it is usually sufficient for 90% of my activities during the day.  And when I need full brightness, I just dowble swipe down the quick settings, and manually increase the brightness.  It can easily save you over 30% over a day depending on the amount you use your phone.

Also, if there are features you don't constantly need, you should turn them off.  In my case, bluetooth and location services I used to keep off on my old phone which had a relatively weak battery.  Since bluetooth constantly looks for devices available, and location always uses data/wifi/gps sensor, etc.. they obviously use battery power.. I keep them off, until I need them.. Usuually I turn them back on, only when I get in the car, in order to pair with my hands free device via bluetooth, and if I need any navigation options.

Anyhow, just a few options for you to check/try.