Designed for optimal comfort and balance, the Powersheer™ 7.4V 2-in-1 Glove Battery features a split-pack design—one battery on each side of the wrist—for even weight distribution and all-day wearability. It's auto on feature is also convenient just connect and turn on glove. NOTE: These batteries are replacements for models Glove Liners & Mid-Weight gloves, they can also be used with all Mobile Warming gloves.