Harbor Freight Electric Fly Swatter - "AA" vs "D"

. Harbor Freight Electronic Fly Swatter - "AA" vs "D" Battery Models Harbor Freight 2 "D" Cell Battery Model: # 61351 or # 40122 Harbor Freight 2 "AA" Cell Battery Model: # 62540 The "D" Cell battery model has a much stronger zap due to the higher current in them compared to the "AA" Cell battery . I recommend it over the 2 "AA" Cell battery model. A lot of reviews on the internet for the 2 "AA" Cell battery model regardless of who makes it have low review ratings. There are also some 2 "C" Cell battery model Electronic Fly Swatters with good reviews that I have seen. .