Hear me out oh land of the Eneloop!
If like me, you have found yourself with far too many AAA devices like those lights, and only packs of Eneloop AAs, this might suit you.
I noticed HobbyKing have their Turnigy's down to ~$0.85 AUD for AAAs, from their International Warehouse. Sadly, it means shipping absolutely kills that part. You can buy up to 20x at a time (site limit, they won't manually add more for me either) which for me worked out to just under $50 AUD on the CC; pay in US! (that's including a bunch of 2-cent items from their bargain bin to make use of my 500g shipping allowance :P)
Yes it feels wrong to pay such a large proportion in shipping, but took the plunge as at a final net cost of roughly $2.50 per battery, i.e. $10 for a 4x it is decently cheaper than LADDA and Eneloops which are $13-15.
Personally I have had a good run with Turnigy AAAs; ones from last stock up 2 years ago still test well on the Lii-500. YMMV ofcourse.
This works out about 3 bux for 4 AAAs