MXYZTRRZ
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Bundle featuring the XiaoMi Piston v2 in-ear headphones plus the XiaoMi 10400mAh power bank for US$32.18 - $10 off the usual price with coupon code MXYZTRRZ. That works out to only $16 per item.
XiaoMi have an excellent reputation for quality products and reviews of these two items have been really positive. Comments on OzBargain reveal this is a genuine product.
Xiaomi 10400mAh Powerbank Review
XiaoMi Piston V2 Review
If you don't want the bundle, you can just buy the powerbank for $19.99 USD.
Via Darkscythe on OzBargain