1. iDogmate Ball Launcher Automatic Tennis Ball Launcher Rechargeable Ball Thrower Interactive Fetch Machine with 3 Safe Balls (Large - Midi) (Click Link to Check Price on Amazon)
Editor's Rating : 8.8 out of 10
Rechargeable Li-ion batteries with Battery Protection Management System 3 x 2200mAh batteries can shoot up to 1700 balls per full charging.

2. Gotcha Talking Dog Fetch Toy, An Automatic Ball Thrower/Launcher - Interactive Electronic Fetch Machine with 3 Small Tennis Balls (Click Link to Check Price on Amazon)
Editor's Rating : 9 out of 10
For very small dogs because the ball is mini sizedTeach Your Dog How to Play for hours and hours of fun and enjoyment

3. iDogmate Ball Launcher Automatic Tennis Ball Launcher Rechargeable Ball Thrower Interactive Fetch Machine with 3 Safe Balls (Large - Midi) (Click Link to Check Price on Amazon)
Editor's Rating : 8.8 out of 10
Rechargeable Li-ion batteries with Battery Protection Management System 3 x 2200mAh batteries can shoot up to 1700 balls per full charging.

4. iFetch Too Interactive Ball Launcher for Dogs - Launches Standard Tennis Balls, Large (Click Link to Check Price on Amazon)
Editor's Rating : 9.3 out of 10
Interactive, on demand ball launcher that lets dogs play fetch to their hearts' contentThis is the large version that launches full size tennis balls

5. Playball Automatic Ball Launches & Thrower For Dogs - Indoor/Outdoor Use. Throwing Distance Settings + 3 Balls Included By Couch Potato (Click Link to Check Price on Amazon)
Editor's Rating : 9.5 out of 10
The Playball Automatic Ball Launcher is VERY EASY TO USE! Your furry friend will LOVE this toy. Launches balls to 3 different distances, This allows your dog to fetch the ball, bring it back and drop it in the hole at the top where it gets ready to auto-launch a few seconds later.This product is specifically made for SMALL dogs. The Playball automatically launches smooth, mini-sized balls which are 1.5 inches in diameter. This machine is NOT SUITABLE for large dogs.