The gloves are great when the batteries are great. It all depends on the batteries. My advice would be to develop a technology where a partial charge doesn't alter the future charging ability of the battery.
I had to buy this battery set as a replacement. One of the original sets stopped taking a charge after a month of use. Given the high cost of the replacement set I hope they last longer than the originals. When they work they work well. But they need to last longer.