KIWI Design Rechargeable Base for Google Home Mini, 7800mAh $29.99 Delivered @ IO TESAI Amazon AU

Another Amazon Lightning deal for the next 2-3 hours.
Not the cheapest deal but best price at the moment, considering they are selling for > $48 on eBay.
NOTE: not compatible with Nest Mini 2019
Ad spiel:
Aesthetic Design - Aesthetically pleasing design with a great silicone soft touch coating, takes nothing away from the audio quality, also adds an extra protection for your Home Mini. A really cool and clean accessory for Home Mini. (Not Compatible with Google Nest mini 2019.Google Mini is not included)
Enjoy Home Mini Anywhere - Comes with a wrist strap, you can easily carry or hang Mini from room to room while cleaning, or in the bathroom while taking a bath to enjoy Home Mini experience.
Easy to Use - Easy to install and remove. The precise openings on the case allow for easy access to all buttons and port, four LED battery indicator lights indicate battery level at a glance.
Real Portable Home Mini - 7800mAh battery provides up to 12 hours of run time (depends on its working status), so you can enjoy it at home or just bring it outside without electricity outlet.(within your wifi range)
What You Get - 1Portable Battery Base + 1User Guide & Warranty. 12-month product warranty.

[Edit]
Use coupon code 'SYTS5Z7Z' to get it for $17.19 + Delivery (free with prime), credit to RichardL's post below. I have tested, the code is still valid!