Have you seen the new generation of portable jump packs? Unlike the old style of jump starters that are large and heavy, this new type is very small and lightweight. The reviews and videos I've watched are largely positive. One model I'm looking at, the Antigravity XP-1 ($96 USD), claims to put out up to 400 cranking amps, which should be more than sufficient for a V6/V8.

Do any LR2 owners have experience using these new Lithium Ion jump starters?

 

I am using a Master jump start charger. Bought it in case of emergency, but never hooked it up my car, just charge my ipad and phone.

 

400 cranking amps, its going to help you with a dead battery

 

I have an older one that I replaced the battery with a same size but higher output battery. works great for me!