47-55.1 New Jump Starter Technology

[vintovka]

Not really an AD question but has made me think. A few days ago a fellow was removing sections of fallen trees with a really beat old truck and winch. The winch killed the battery so he whips out one of the new tiny Jump Starters from his glove compartment. First It instantly started his big V8 and second was able to wind in his 12,000 Warn. Battery meter said 80% charge left. -- Flat amazing. Am getting one for my 350 powered AD. In addition some of these Jump Starters have both Battery maintenance and repair capabilities. These would be handy for storing one for a couple months. The question begs could these be used as primary battery and free up room? In any case this technology is amazing.