I also will vouch for the lumintop tool AA 2.0 with a Nitecore 14500 micro-usb rechargeable battery. Lots of light in such a small package. And even if for some reason you have to use regular AA batteries, you would have slightly longer runtimes and still have more than enough lumen output for...
I love the smaller size of the EC11 but I was shocked about the listed runtime on low. The MT10c boasts 120 hours on a 1 lumen low mode whereas the EC11 is listed at only 12 hours for the same 1 lumen mode. Could this be a typo? Can anyone confirm runtimes?