Power plan?

Question

Electronics

A 12 volt power supply and a 12 volt battery pack are used as a power source. Tell me the options for circuits for automatically switching from a power supply to batteries when the first one is turned off.

Answer 1

zeroelectronics.ru/practices/neskol-ko-shem-reserve...

Answer 2

oh no, it's not so simple if you keep the battery constantly connected so it won't last long, if you use diodes the battery will be half discharged here you need a circuit with periodic discharge and charging, control of the incoming current, etc.

Answer 3

If EXACTLY 12 Volts - then 2 diodes. The mains power is lost - the current will go from the batteries.
If not exactly 12 V - a switching relay powered from the mains.

Answer 4

If you keep the battery pack constantly connected, are there any network conflicts?