Model defective ... Expensive to detect ...

I chose this model, more expensive because it seemed well on design and other reviews were mostly positive.
Upon arrival, everything is fine, I put the battery, it's perfect. The next day he died. What good, provided the origins of batteries are often of poor quality, I further command (Energizer). I try again and there, same symptom. The two new batteries leave me in two days. Stubborn, I try again with another battery that I measure the multimeter before inserting (nice 3.3V, therefore, perfect stack). And you can imagine the result.
Taking this brand, I expected a real quality control, and it seems this is not the case. HS thermometer and 4 batteries on the arms ...