Servo glitch happens when I try to control giant scale servos multiply.

e5f180bc57ad02a1329e02ee264a03503cb000ce.jpg

I posted an image file. When I connect 3~5 servos like that with inputting right voltage and current to Big size analog servos with an adapter servos operate weirdly. Please tell me what’s the problem. Thank you

--------------I forgot to draw servo’s GND connected to aduino. It’s actually connected -------------

Monitor the servo supply voltage while running multiple servos. It says 456 - 684mA for each servo. I would think that that is running current. How much current can the battery supply before its output voltage falls? Start up or stall current will be much higher and could cause the servo power to dip.