This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Battery Multiplexer

Hello everybody, 

I'm looking for a device/circuit/IC which allows me to multiplex n non rechargeable battery packs.
I want my system to begin to deliver VCC from the first one and change to the next one as soon as the voltage drops below a certain threshold.

Is there such a "thing"?

Thanks in advance
Mirco