Fwiw, I did some measuring on my IP2M-841B-V3 cams and I want to share the results with you.
First I checked the power supply (rated 5V/2A) that came with the cam and measured voltage while changing the load (or current):
4,8 V at 1,0 A
4,6 V at 1,5 A
4,0 V at 1,8 A
For comparison, I also checked the power supply of my old HooToo HT-IP211HDP, also rated 5V/2A:
5,15 V at 1,3 A
5,04 V at 1,9 A
5,00 V at 2,2 A
Next I checked the power consumption of the cam at stabilized 5,0V:
Conclusion: The power supply doesn't meet the specified rating but as the power consumption of the cam is pleasantly low, it is sufficient to feed the cam.
First I checked the power supply (rated 5V/2A) that came with the cam and measured voltage while changing the load (or current):
4,8 V at 1,0 A
4,6 V at 1,5 A
4,0 V at 1,8 A
For comparison, I also checked the power supply of my old HooToo HT-IP211HDP, also rated 5V/2A:
5,15 V at 1,3 A
5,04 V at 1,9 A
5,00 V at 2,2 A
Next I checked the power consumption of the cam at stabilized 5,0V:
- while booting/adjusting: up to 0,8 A
- day operation w/o IR: 0,38 A
- night operation with IR: 0,40 A --> equals 2,0 W on DC side
Conclusion: The power supply doesn't meet the specified rating but as the power consumption of the cam is pleasantly low, it is sufficient to feed the cam.