Nah, they've matched the weight of the fake batteries now.
I bought a 30,000mah power bank, weight seemed good, but it could only 1/2 charge my phone once, indicating a real storage of 2,000mah.
Ripped it open earlier this week to find ........ 1x 10,000mah battery (which appears to be fake) plus 2 sheets of steel to up the weight.
Just purchased a 20,000mah battery from Lazada for 320bht, which I'm hoping is real, to put in the fake power bank enclosure.