Raspberry Pi 2 is unstable.

Actually you guys right - this is power supply issue. I tried next steps. Connect Pi2 to Li-Ion battery with USB. See pic. And all working perfect. No one faults over 2 hours. Ok. That is good. I made update and upgrade for apt-get. And further. Get short USB cable with ferrites and connect to another power supply. And whole day Pi2 works very good. No faults and much stable.
Thanks everyone for advices and help!

Noooooooooooo!

Don't run those on top of those anti-static bags - while the inside is nice and protective the outside is a farmhouse for static charges.

while the inside is nice and protective the outside is a farmhouse for static charges

Well I would disagree.

The HDMI lead plugged into the monitor will be providing a ground.

This is the pdf of the bags supplied with the RPi2.

http://www.antistat-esd.pl/doc/torebki_ekran_otwarte.pdf

Please note the inner and outler layers are conductive.

For the reasons of conductivity and possibly thermal, its not the best idea to run them like sitting on the bags.

For a few dollars you can buy cases ... which aren't listed as conductive or antistatic coated ....

Mark

I stand corrected.

Your advice was appropriate for some bags.

It just happens that these are a very good quality bag  .... better than I thought.

Static builds up and unless it is discharged or dissapated it can cause issues where a pin is raised to a potential higher than the others.

Discharging one's self by making contact with an earthed surface BEFORE touching the electronics is preferable.

Mark

Hang on a moment though... surely if the outer layer is actually 'conductive' (as stated above) that surely implies that it will conduct electricity, and could therefore connect, and possibly 'short out' some of the exposed components on the underside of an otherwise protected board?

Personally I would NOT advise placing a 'live' RasPi on on of these.

surely if the outer layer is actually 'conductive'

Did you actually read the pdf I referenced above.?

10 ^8 to 10^11 ohms is 100M ohms to 100 G ohms

Mark

Yes I did, thank you Mark, but just having a high resistance, doesn't necessarily make it non-conductive.

It is obviously up to each individual to make up his own mind on what to use, but I will stick by my comments.

Well. Just having a high resistance is exactly what makes things non-conductive.

Everything conducts electricity to some point. Above some arbitrary threshold you call things "non contductive" because for all practical purposes no electrical current is conducted. In this case "10^8 ohms" is for all practical purposes "non conductive". Put a 5V over this and you'll get a "short" that carries about 2*10^-7 A. or about 0.02 micro amps. THAT will be difficult to measure, let alone influence the raspberry pi. (the influence of "at some time in the past few years you've touched the 'pi with your bare hands" is on the same order of magnitude. You don't worry about that, do you?).

A friend of mine works with voltages of around 3MV. Megavolts. A current of 0.03A at 3MV represents 100kW and that is something that could be quite deadly if overlooked....

It is obviously up to each individual to make up his own mind on what to use, but I will stick by my comments.

You are entitled to make up your own mind.

Sometimes when the facts don't support your theory, you have to decide if your theory is still correct.

If you cannot confirm the bags design then your comment   Personally I would NOT advise placing a 'live' RasPi on on of these.  is perfectly valid.

Mark

Actually, Anti-static bags are conductive on both sides, so they will short out your board.  Doesnt use any plastic either.  Purchase an ESD mat if you are going to work on table top.

Actually, Anti-static bags are conductive on both sides, so they will short out your board.  Doesnt use any plastic either.  Purchase an ESD mat if you are going to work on table top.

Actually, Anti-static bags are conductive on both sides

Sorry but that statement isn't true.

Mark

The datasheet of the anti-static bags (*) mentions some resistance. We tried measuring it, but were unable to make a connection or measure a resistance. 

So.... the bags will NOT short your pi if you put the pi on top of the bag.

(*) The ones that the 'pi comes in.

as Everyone else is saying... there not a short.

The bags are dissapative or simply resist the build up of a static charge, mostly there to stop a static zap on the outside traveling to the inside and damaging the component within

Dave Jones of the EEVBlog has done a few videos on this subject if your interested in finding out

According to a major static bag manufacturer, Anti-static bags contain conductive material.  I would never place any electronics in a powered up state on or in an Anti-static bag.

Before You Buy: Comparing Anti Static and Static Shielding Bags

Hi!

There are different kinds of bags. There may be a confusion between anti-static bags, conductive bags, and exactly what part

of anti-static bags is conductive.

The anti-static bags may have conductive layers, or conductive material, but often it is part of an internal layer.

For example, this manufacturer states 10^8 to 10^11 ohm surface resistance, which is quite high, beyond my handheld Fluke measurement capability (I have tried it).

That would be safe from a conductivity point of view. The layers do not split on the bag mentioned. They may with other bags. No idea.

There are very conductive bags too, they are called (unsurprisingly) conductive bags, but they are usually black in colour. They have a very low surface resistance (less than 1kohm is

possible!), definitely not suitable for placing powered circuits on top of. They are fantastic for storing MOSFETs though. They are easily measurable with any handheld multimeter.