Nitecore Tube Micro USB Rechargeable Keychain Light $7.98 AUD with Free Postage @ Banggood
I asked Neal at Banggood for a deal on these and asked if its OK to share here as well.
This is the cheapest price I have seen them so far.
I have bought 8 previously from different sellers and I'll buy more this time (they are awesome for the price).
Full specifications: http://flashlight.nitecore.com/product/tube
Youtube review: https://www.youtube.com/watch?v=ssGu5g7b6JA