Powering servos

I am trying to power 8 servos. These are the ones I am using:

https://www.amazon.com/TowerPro-SG90-Mini-Servo-Accessories/dp/B001CFUBN8

They are the Tower Pro SG90 9G mini servos
I was wondering if anyone had any tips or any products I should use. I would really appreciate any help.

(Those are micro servos actually, according to the servo label, although Amazon says mini. But that's an aside.)

I can't help with naming a battery by brand or chemistry, but can point you at this page which says you need the following current per motor:

  • Running free: 270mA
  • Stall: 730mA

So worst case is that if they all stall at once, you need to be able to supply 8x 730mA = 6A.