In this video I'm testing another cheap Li-Ion 18650 battery from Ebay. This one cost me $2.30 including shipping. The 2300 mAh capacity is not impossible in the real world, but my battery analyzer says only 949 mAh. The battery weighs 37g. I'm not sure is it a fake production, a rejected defective cell or a cell taken from e-waste, for example old laptop batteries, and repackaged. You be the judge. But I think having barely 1Ah it is not worth it.
Warning: Li-Ion batteries may catch fire or explode. It is
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