I used to have the Tank007 TK703, and it was a great light; a bit bigger than the E09, and was significantly throwier, but it's performance was significantly less on Alkalines than with 10440s. The tube was glued making it very difficult to disassemble. The battery tube spring was on the positive end of the light, and the negative end on the tailcap was flat. You could not use a cell which had a wrapper extending past the shoulder on the negative end of the cell, meaning that any 10440 cells had to have a small magnet to make contact on the negative end.
I eventually shorted the driver accidentally, killing it in the process, so I modified the light to be DD, but I would imagine that's not good for the little 10440s, so I wasn't comfortable carrying it that way, and moved on to the E09 which is smaller than the 703 due to the twisty vs. clicky.
Surprisingly, before I started carrying the E09, I had purchased the (extremely) generic and very cheap SuperBright 7-1...
http://www.manafont.com/product_info.php/superbright-71-led-flashlight-1aaa-p-5818
and the larger diameter SuperBright 7-2 and really liked having them. They both use the same generic low-end, large-die, 5mm type of LED that the really budget lights have, but it still puts out enough light for the vast majority of tasks needed for my normal EDC use. They will not run from 10440s and are not water tight or extremely bright, but they are very lightweight and very cheap, and if lost or stolen, it would not be nearly as upsetting as losing a higher-end light. The 7-1 is the same size as the TK-703 and both have clicky switches.
The 7-1 and 7-2 are both available from DX and are significantly cheaper from there than the 7-1 from Manafont: http://dx.com/p/super-bright-7-1-3w-30-lumen-led-flashlight-with-strap-black-1-aaa-44705?item=13, http://dx.com/p/super-bright-7-2-1w-30-lumen-led-flashlight-with-strap-black-1-x-aaa-57748?item=15.
The larger head of the 7-2 doesn't gain you anything over the smaller 7-1. I preferred the 7-1 due to it's smaller diameter and lack of crenelation. I had to give my 7-2 the Foyzel treatment for pocket carry...
Here's a review Old4570 wrote on the 7-2:
https://budgetlightforum.com/t/-/2048
These are the TRUE budget lights; they present a value due to their low cost and the actual function they provide. And they are cheap enough to add onto an order to prevent a significant loss if they fail to live up to your expectations...
...and the 7-2 bakes to a very nice orange/gold/copper if you try...
