Here is a compact power bank that doubles as a hand warmer for those cold winter days. This Smartphone Power Bank & Hand Warmer comes with 5000mAh battery capacity and has a max temperature of 52C. To activate the hand warmer mode, simply hold the right button for 3 seconds.
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This gadget measures 68.5 x 74 x 33.8mm. You can find out more about it here.
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