This product ships without a power bank, so you can use your own.
If you need a power bank, you can pick one below.
 Glovii heated 4-in-1 hand muff, carbon fibre, 9 W, for a power bank Product code: GF41  One product, four uses. The muff warms the hands, but it also clips to a pram handle, lies against the back or goes under the head as a pillow. You take the power from any USB 2 A power bank.  On the lowest level with a 10000 mAh power bank the muff heats for twenty hours. It weighs 170 g without the battery, so it hangs on the neck without weighing you down. The closable pocket holds the power bank in place.  Key features
 Technical data
 In the box
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