This is just at little tip, that I use. it is not something fancy, just a easy simple way to keep your tester and battery together
First your need a servo tester ;) (sorry but can't do magic)
Then you need some kind of battery, i use a 6v 2500 mah nimh
Some velcro to put on both the battery and tester.
A switch. You don't NEED NEED this, i just like it.
Then you need some zip tires MUST BE GREEN ;)
Then you just put it all together. and your done.
Hope you enjoyed this, and yes i know it is not rocket science