I have a 4 cell version of one of these in the starter box for my toy car's .21 cubic inch engine! The big problem with lipo batteries is you really don't want to deep discharge them - they don't like it and tend to swell up before self igniting!
Although the current draw capacity is ace the storage capacity will soon be used trying to start anything of a decent size
Li-fe cells are slightly safer as they will take a deep discharge and I use them for in car electrics - they don't mind a bit of knocking about either 
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===SOLD===2002 Audi S8 D2 Final Edition (yes, really) in Avus Silver with purple extended leather===SOLD===
2011 S5 Sportback in Phantom Black with black Super Sports leather, 9x20s, tech pack high, adaptive xenon plus, intelligent key, memory seats pack, sunroof, B&O, Audi Drive Select & quattro Sports Diff, DAB, parking system plus
2015 VW Golf GTI Performance Pack in Carbon Grey with black Vienna leather, tech pack (Discovery Pro nav & Dynaudio), DCC, factory towbar and retrofit RVC
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