Phone charger how to measure the voltage correctly?

Question

Electronics

I want to measure the voltage from the charger for phones.
On the charging itself it says "Output: 5v 1a".
The multimeter has two modes ACV (for alternating current) and DCV (direct current).
As far as I know, we have alternating current in our sockets.
I read that chargers convert alternating current to direct current. So, when I measure charging from the phone in AC mode, it gives out a voltage of 10V, and when I measure it in DC mode, it shows 5V.
Actually the question is: "Why does the multimeter show anything at all in AC mode and why is it twice as much as in DC mode?"
Tried several different memory. The result is the same. In direct current mode n, in alternating current 2n.

Answer 1

Chargers differ from PSUs in that they are not stabilized by voltage, especially in idle mode you cannot measure correctly.
So you measure in the socket or after? The charger must be decoupled from the network (even cheap "Chinese").
Because they (chargers) are pulsed, aren't they? :D And because they are stabilized by current.

Answer 2

For example, connect a 10 kΩ resistor to it and measure the voltage at its terminals. In DC mode, of course.

Answer 3

do not feed the battery bank, directly, from charging (without that controller, which in the battery will
kill the acc at a time, well, or in two
, the network is full of docks / vidos, for each type of battery,
I would try to explain on my fingers,
but you is this not necessary?