I just bought my Joye 3 and i didnt buy a battery from them you know the standard 350 Mah battery.i thought i could try my 900 Mah rechargable battery but its not working at all, i also tried tried 3 diffrent battery's that were 500 Mah and 750 MAH. Help! these batteries are brand new. Is there any way i can get one at radio shack that will work? i want to see if its the battery's or the device it self thank you.