Telesport via Amazon offers the Paxcess 100-watt 40,800mAh Portable Power Inverter / Battery Pack for $143.88. Coupon code "H9IYXB9Y" drops it to $93.52. With free shipping, that's $4 under our Black Friday week mention and the lowest price we could find by $73. It can be charged by a solar panel (not included), wall outlet, or vehicle (12-volt adapter included) and features AC, DC, and USB power outputs. Deal ends December 31.

Update: The price has dropped to $139.99 before coupon, $90.99 after.