That's interesting that yours eats batteries. In mine they seem to last forever.I have owned both pocket radars. Both posted identical speeds when used side by side. I preferred the ball coach pocket radar and sold the original model. Easy to use catching my kid and easy to radar others at tournaments.
The one thing to do with the pocket coach is to buy some rechargeable batteries cause it eats them up. I also recharge regular Duracell AAAs too but I don't charge them more than 12 hrs.