Kui Q.wrote a review of Black Diamond Solano Heated Glove on December 2, 2019
Familiarity: I've used it several times
So the reason why people go for heated gloves, is because they want to get even warmer in super cold weather around -10 to -20 degree Celsius.
that means the gloves themselves have to be good. this is the fundamental thing to do.
This gloves doesn't keep your hands warm especially at the finger.
the heater is ok but it's pointless if the gloves isn't warm or able to keep the warm.
have to return this one and give outdoor research a try.