[Perfectlap]

This looks like a good product to keep in the cubby storage compartment or side pockets.
Otherwise you have to route that trunk release cable or hope the battery goes down when you're at home with an extra battery pack and 2 jumper cables, Unless you drive around with that all the time.

http://www.amazon.com/Wagan-EA2045-SelfCharge-Jumper-Jumpstarter/dp/B000066OC8/ref=pd_rhf_dp_s_cp_6?ie=UTF8&dpID=41X3VZJGY7L&dpSrc=sims&preST=_SL500_SR135%2C135_&refRID=0QQ7B299B6FVYRG85GWY