Digital servos NEED current and a low mAh pack can not handle there high draw from small packs. They may only need 500-1000mAh total but have a NEED to be able to draw larger amounts of current than std servos do. I am going to be running a 1800mAh pack to run 4 5925 servos because it has the LOW IMPEDENCE I need and the size to last a few good flights.

Dave