
My device requires 3 batteries. 1 out of 3 died during installation and the unit didn't work until I found the dead one and replaced it. then the device lasted only two days and the original batteries more than 4 weeks. Checking the rest of the batteries, 1/2 didn't have a full 1.5V. If the advertised shelf life is 3 years, then they're completely lying. In fact, Revain should be ashamed to have her in her shop. I do not recommend buying.

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