Sorry to jump in so late,

for a budget conscious purchase, my brother recommended me the Zenflare F2. 2xAA, four modes (200 lum, 50 lun, 15 lun, strobo), memory function, water resistant ecc. I had a chance to use it a few weeks ago and had a good impression. It'only 12$ on Amazon Usa.

www.amazon.com/dp/B0713PL4H1/ref=twister_B071NXWH2F?_encoding=UTF8&psc=1

I just ordered one for myself, stimulated by this very thread on 2xAA lights...