Ending today, Groupon offers the Stanley FatMax Professional Digital Power Station for $99.99. Coupon code "TECHB5" cuts it to $94.99. With free shipping, that's the lowest total price we could find by $72. It features a 700-amp jump starter, 120 PSI digital air compressor, 500-watt AC power supply with 500-watt inverter, two AC outlets, 12-volt and USB outlets, three nozzle adapters, compressor nozzle, clamps, and digital gauge.