2 maybe 3 AA's VS 6 Hozer. Hozer wins... These are all proto's, homebrew or repro but so valuable to me. Tried to find the reproducer of RSC but never found him or her. Maybe its An AtariAge but with a new label, i don't care, it Costed me about $30 and still very happy with it. Also happy with harem which i bought in the usa, the box in germany and manual i made myself...