Power Pack P76 (Optional Accessory); Auto Off For The Flash Unit; Switching The Flash Unit On And Off - Metz MECABLITZ 58 AF-2 digital Manual De Instrucciones

If your flash unit is not going to be used for an extended period of time,
remove the batteries.
Replacing batteries
When inserting batteries, ensure that the polarity is correct and matches
the symbols in the battery compartment. Inserting the batteries in the
wrong direction can destroy the flash unit!
Always replace all batteries simultaneously, and make sure that batteries
are the same brand and have the same capacity.
Flat or dead batteries should not be disposed of with ordinary household
waste. Help protect the environment, and dispose of flat/dead batteries
at the appropriate collection points.

3.3 Switching the flash unit on and off

If your flash unit is not going to be used for an extended period of time,
we recommend turning it off with the main switch and removing the
power source (i.e., batteries).

3.4 Power Pack P76 (optional accessory)

In this case, no batteries have to be inserted into the flash unit.
To protect the flash unit from thermal overload when connected to the
Power Pack, a monitoring control increases the recycling times during
heavy usage. Both flash unit and Power Pack should be switched off
before the connecting cable is attached or removed from either unit.

3.5 Auto OFF for the flash unit

The flash unit should always be turned off using the main switch
is not going to be used for an extended period.
if it