Project not working when too little power?

Other Hardware General Electronics
21

LandonW:
Just because there is more available watts in the 9v situation

Not true.
The 5V charger can produce a higher wattage than the 9V battery: 5V * 0.7A = 3.5W.
A 9V block battery struggles to produce 200 mA: 9V * 0.2A = 1.8W.
In fact a single AA 1.5V alkaline battery can easily produce 2A of current, for a 3W output, far more than that 9V can do.

22

wvmarle:
Not true.
The 5V charger can produce a higher wattage than the 9V battery: 5V * 0.7A = 3.5W.
A 9V block battery struggles to produce 200 mA: 9V * 0.2A = 1.8W.
In fact a single AA 1.5V alkaline battery can easily produce 2A of current, for a 3W output, far more than that 9V can do.

I was going off the OP's post in comment 12 I think it was