You won’t find rechargeables “that will put out a full 1.5V” no matter how hard you look, because the 1.2v is “dictated” by the chemistry (NiMh). However, if you look at and compare the discharge voltage curves for 1.5V alkalines vs. 1.2V NiMhs you’ll notice that in alkalines you are not getting 1.5V for very long at…