I have had battery gloves in the past but they always seemed to run down before I got home. Also a bit bulky inside the glove. My current Gerbing heated gloves have permanent cables direct to batteries on my three bikes. Always toasty warm and like ordinary gloves riding. Not saying yours won't last longer or be more comfortable - just relating my experience. The down side to main battery wires is fixing on and off before and after riding. For longer journeys they may be better. In glove batteries may be preferable for multiple stop start rides as you mount/dismount with the gloves on. I have my wires routed inside the lining of a spare jacket so I can hop on the bike and connect to the battery cables fairly quickly. I used to find fishing inside the glove to switch off the portable batteries a bit fiddly. Best of luck whatever route you go down.
