Hi guys.
I borrowed a low-quality multimeter and use an USB adapter (5v regulated) as power source, then did a very rough test
The Viper draws about 1.9A without TEC.
With TEC, it draws about 2A just after cold start, then slowly increase to 2.2A after a few minutes warming up, which is the USB power adapter limit. At this point, the picture begin to distort and I cannot even reboot the camera with TEC. If I power the camera on without TEC, then connect TEC, picture and function indicator instantly messed up.
I will do a better test after got a proper power source and meter
Thanks.