I also use the RST Paragon 6 gloves. Bought from SBS with a spare set of batteries on a deal they had, which basically made the spare batteries FOC.
On low a set lasts about four hours, so two sets last a days ride. Medium is quite warm, not tried high yet but presume that would be quite hot.
My mum suffered badly with Reynauds, and I’ve had problems for the last couple of cold seasons, so presume it’s coming my way. These gloves definitely make the difference between riding and not riding, so a good investment.