Walmart again offers the Stanley FatMax 350-amp Jump Starter with Compressor in Silver, model no. J7CSR, for $39.88. Opt for in-store pickup to dodge the $4.97 shipping charge. That's the lowest price we could find by $16. (For further comparison, we saw it bundled with a 3-Foot Lightning to USB Cable and a 3-Foot microUSB to USB Cable for $5 more last week.) It features an output of 350 amps (with a peak output of 700 amps), 120 psi compressor, pivoting LED light, and 12 months of Priority Auto Assistance road-side service.