I just got a battery for my V1 less than two weeks ago. Today, my generation 2 had finally grown into an adult (Robotchi), but when I looked at it a few hours later, it had the flashing battery symbol! That can't be normal battery usage, and what makes it worse is that I always had the sound off to try to conserve battery! I took it out and I don't know what to do now; I guess I'll wait until I find a V2 and then get rid of my V1! It did make a funny humming noise... leave it to me to get a defective one!