using battery powered car jump starters as DC source for LiPo charger?

[nextmoneypit]

I brought my charger and 4 dead LiPo's to work so I could charge them and play after work...but I just realized I left the AC > DC converter at home . I thought of alternative ways to charge...a portable car jump starter perhaps? And then I saw these battery powered ones on amazon...in the 10,000-20,000maH 200a-400a peak range. I thought hey, that would be great to have out in the field! Could something like that work?

I'm not electrically inclined too well, but the one issue I can think of, they list *peak* amp outputs around 200-400a, depending on model. I have a dual charger..so does that mean they can easily trickle out 5 or 10 amps to charge 2 LiPo's for a half an hour?


Here's one model:

 

[Craftydan]

I use an old (~3yo) lead acid jump starter for field charging all the time. Up until the charger browns-out, it works just fine -- the harder I charge, the sooner that happens.

It's not fantastic, but I can easily charge a handful of packs with it . . . however I really don't want to break down later that night

 

[nextmoneypit]

Heck yeah, if the electricity math is straight forward...10k - 20k mAh is quite a few LiPo's charged!