Technote #12 - Using a 2 AA battery adapter to extend the operating time of the SIM-ALP2 Analog Simulator
The SIM-ALP2 requires two AA batteries to operate. To extend the operating time, you may use an AC adapter designed to replace two AA batteries such as. https://amzn.to/2KozcsQ. The adapter must output 2.8V-3.3V, minimum 600mA.