Why a device need the 2 poles from the SAME battery?

[Magnethos]

I mean, If I connect a device to the + pole of a battery and then to the - pole of the battery the device works. But... Why that not happens when I connect the + pole and the - pole from different batteries? 


PS The red points are leds

[AB Hammer]

I mean, If I connect a device to the + pole of a battery and then to the - pole of the battery the device works. But... Why that not happens when I connect the + pole and the - pole from different batteries? 


PS The red points are leds

That is simple for you have what is called an open which means no circuit. you need a closed circuit to do anything with your batteries and batteries have to be in line with the circuit. 

[Magnethos]

That is simple for you have what is called an open which means no circuit. you need a closed circuit to do anything with your batteries and batteries have to be in line with the circuit. 

Tom Bearden says that if we connect the two poles in a closed circuit, we will kill the battery. He says something about the open circuits. Anyone knows more about that?

[pese]

I mean, If I connect a device to the + pole of a battery and then to the - pole of the battery the device works. But... Why that not happens when I connect the + pole and the - pole from different batteries? 


PS The red points are leds

both cant work
1. open circuit ( lik eswitch is opened)
2. not (like switch closet, but 1.5 volts to low - to light and LED)

G.Pese

Possible the meaning of Newman is an "other one" that you (we) have  (also) not understand

[hypersoniq]

Electrons need a path, the 2 battery system won't work unless you connect the other ends to a common wire, then you close the loop and electrons can flow.

Your first pic. shows an OPEN... circuit is not closed and electrons cannot flow.

your second pic shows a completed circuit, CLOSED

the other variation is a SHORT, since electrons follow the path of least resistance, if you took another wire and connected it to both ends of the same battery in the second pic, the LED would get dimmer or even go out... (pese is correct about the low voltage from a 1.5v cell being too low to even light that LED)