Amazon with Mengqikeji(shenzhen)youxiangongsi has the LIFEBEE 8-Hour Portable Rechargeable Double-Sided Pocket Hand Warmer / 5200mAh Power Bank (Pink or Green) for $30 - 40% off with code NWZ5SD9D [Exp 1/15] = $18 with free shipping on $25+ or with Prime.