I just ordered a pair of the Gerbing 7v battery operated gloves. I'll post here on how they perform during my daily commute once they arrive. They claim anywhere from 2-8 hours per charge depending on the heat settings. If it works well, it's an option for our bikes that won't require tapping into the bike's power.
Doesn't your bike have the heated hand grips?
Anyway, I have the
Snow Deer gloves. They work quite well even when turned off. They are very well insulated. They work better than most winter motorcycle gloves even when off.
BTW, it's best to turn them on a minute or so before you put them on your hands. Then you can really feel the heat. But if really cold, don't expect them to feel warm while riding, but hands will not get cold.
Battery life (7.4 volts, 2.2 AH battery per glove), on a charge isn't great on the highest setting. And the other two settings don't help much. They take a lot longer to recharge than you may expect.
They work fine bit don't expect a lot of heat for long from those small batteries. And best to carry a couple of charged up spare batteries.
If you're using both those gloves and your heated grips, I am sure they will work very well.
I have the 12 volts on my Energica for other stuff, such as my Garrnin GPS or to operate a small tire pump in case I get a flat.
-Don- Reno, NV