Review on IClever BoostCube Universal Foldable Bluetooth by Black Croom

So, I am a regular buyer of this charger. In fact, I've bought the same charger twice in the past (one charger per order). The first two worked flawlessly and still work today. They did exactly what was expected: a smart charger that protects my connected devices by sending it the optimal amount of juice for the fastest charging time. They worked great! That being said, I later saw this charger in this two pack and ordered it to have extra chargers in my shed and in my basement. When these last ones (two packs) arrived I was dying to try them. I included them and zip.nothing.zilch. Neither of them responded when connected. I compared the new chargers to the two old ones I have and they were all identical except for the wattage and model numbers. This is weird, I thought to myself, so as a test I plugged my old ones into the sockets in the barn and basement and voila! As a last resort, I tried new chargers again and got no response because the battery icon on my devices didn't show that little lightning bolt icon when plugged in. I even went as far as swapping out different USB cables, still to no avail. I even noticed the 25% battery on my device and left the new charger plugged in for a few hours thinking maybe the lightning bolt icon wasn't something that showed up on newer models or something. Tried charging different devices. No nothing. These dual chargers were dead on arrival so I returned them and unfortunately will now be looking for another brand. I'm upset because the first two I had were amazing and still are! What happened? I just had a bad run on this right.? Due to the love-hate relationship I've had with these chargers, I'm rating them a fair three stars right in the middle. Sigh.