A few months ago, I received the BMX SolidSafe Air power bank. These power banks aimed to fulfill the same needs as BMX's SolidSafe power banks, but they relied on the lithium-ion battery technology that has been the standard for decades. Both power banks offered Qi2 magnetic charging, but I focused on the smaller power bank as it was a closer match to my 5,000mAh BMX power bank. While I would have liked to see rounded edges on the UGreen MagFlow Air, UGreen could not have done anything to make it thinner. Both power banks had a maximum power output of 20W, and drained their batteries in roughly four hours each time.