A bit of a saving on the battery-box over their eBay price ($54.95) and a free headtorch so you don't trip over the tent guy-ropes at night.
5% TopCashback today.
Sign up to their newsletter and they'll email you a $10.00 voucher code (minimum $100 spend though).
Delivery to nearly all locations is $18, although delivery to some remote locations (e.g. QLD Far North, WA Remote, TAS Remote) will cost more.