In my opinion, the device performs the declared functionality. Previously, I charged with conventional automatic charges without indication and mode selection. Long and unclear what you get at the output. Checked all available batteries. For some, there were doubts, testing showed that it was really time to throw them away. The device restored several AA batteries and started working again with the indicated capacity. There was a Chinese battery "Fire" of the 18650 format from a flashlight with a drawn capacity of 5200 mA. I strongly doubted such a capacity, because. in the lantern it lasted a maximum of 30 minutes. And it seems that there is no 18650 with a capacity higher than 3500 mA. The test showed the actual battery capacity of 386 mA))), which is more like the truth. Several runs of tests did not change the result.
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