No matter what kind you buy, be sure they fit well. If the gloves are too loose you will not feel the heat as much and if your handle bars are not protected by a fairing your hands can feel cool. The glove have heating elements in the back of the hand, not the palm. So, your hand is gripping a cold grip/throttle. If the glove is too loose you won't get the heat tranfer. I am bringing this up simply because I personally dislike what to me are "tight gloves" in general, but for the heated variety, I am willing to deal with it for the warmth.
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My wife has "Reynaud's Syndrome" (vasoconstriction of the toes and fingers, turning them white/purple. Very painful and triggered by the cold) so we went with the Gerbings that are 12V and have the portable, rechargeble batteries. She plugs into the MC charging system when riding and then pops in the batteries when she gets off. The batteries have a high. medium and low setting built into the battery housing. The batteries fit in a pocket in the gauntlet of the glove. They were pricey but having and unhappy, cold and "in pain" wife is even more expensive....