Meritline offers the factory-refurbished Mophie Juice Pack Powerstation Universal External Battery, model no. 1137_JPU-PWRSTATION, for $49. Coupon code "MLC6G8AXNL1" cuts it to $39.99. With free shipping, that's tied with last month's mention and $38 under the lowest total price we could find for a new one. The Juice Pack Powerstation is a 3600mAh external battery that works with USB-based mobile devices and smartphones. A 90-day Mophie warranty applies. Coupon expires after 200 uses.