Its possible to use camcoder without original battery. Only powerbank and this cable. Great.
After delivering these cables to me, I immediately tested the Sony HDR TD10E. They work and charge two batteries via these cables. I checked the maximum current charging. It was 4,95V 1.6A max. The camera works on powerbank, charging 5,0V 0.65A maximum. I recommend this solution and this device also as a redundant or main power supply for the camera.