PowerBox Evolution Dual Power Supply User Manual with Switch

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To change the output voltage, connect both batteries and switch the PowerBox
Evolution on.
Now disconnect both batteries from the PowerBox Evolution.
Press the SET button and hold it pressed in. With the SET button pressed in,
reconnect Battery 1 and Battery 2.
The selected setting is indicated by the LED monitor on the PowerBox Evolution:
all the LEDs on the appropriate side light up:
1 x ash means that the regulator is now operating at 5.9 V
3 x ashes means that the regulator is now operating at 7.4 V
The output voltage is switched by a toggle process. Example: the set voltage
is 5.9V; if you connect the batteries with the SET button pressed in, the output
voltage changes to 7.4 V, and the LEDs ash three times. If you wish to revert to
5.9 V, you must disconnect the batteries and repeat the procedure.
Caution: it is essential that both regulators are set to the same voltage. If you
set only one regulator to 7.4 V, the voltage at the output is 7.4 V.