I'm in the USA. Recieved mine #51 almost a month ago. Right out of the box the sound unit didn't work. Ordered AG5 batteries from Amazon and bought some 393 batteries from my local grocer since 393 is supposed to be equivalent to AG5. Noticed the 393's didn't fit in the sound unit. Had to use 2 393's and one of the batteries that came with the unit. Got sound working. Then the next day no sound. Batteries seemed exhausted. AG5's arrived from Amazon, but they were too small for the unit, they just clunked around in the chamber. Again, used 2 AG5's and one 393, got sound. An hour later, no sound.
I contacted Rubbertoe and they were very helpful, even sent me a new sound unit. It arrived and didn't work out of the box either.
I'm wondering, the sound unit is from a War Doctor Sonic by CO, and it runs in the WDS on two larger button cells. Maybe the AG5's don't have enough juice. I don't know where Rubbertoe gets their AG5's because every type I buy doesn't fit in the sound unit.
Anyone else noticing this?