Milwaukee M18 12.0 Ah Batteries on AliExpress - Tool Battery Store Ripoff 

Advertised as 12.0 Ah batteries but they are really about 2.0 Ah batteries.
Most stuff I've purchased off AliExpress has been as advertised. Sometimes cheaper quality than I'd hoped for, sometimes even better than I expected. But these batteries aren't what is advertised by a long shot.
And most things I've ordered on AliExpress arrive within a couple weeks. These took a little over 1 month.