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Author Archives: Adriano

Professor, Engineer and buyer of products crazy China.

Dummy Cells – good idea or crazy?

Did you know that rechargeable batteries have 1.2 V voltage while the common are 1.5 V? This small voltage difference (about of 20%) can cause the rechargeable battery does not work properly, or lasts a short time in most appliances. Was ...

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Green Laser pen 5mW 532nm

It's been a while that I wanted to buy a green laser pen. This is 5mW and 532nm. Looks like a pen, but it's a laser! The device has a head that refracts the laser into several directions, creating a very effect ...

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