How-to Jump Start a Car with a Lipo Battery

#jumpstart #fpvdrone #howto #lipobattery

[@saniabearsky]

really bad idea, which I just tried 😂😅 my 6s almost caught fire!! 2.2 diesel toyota didn’t start😢 It was about 20v charged and has 100c, so 120A for 1200mah Cells were initially balanced, but after two tries to start the car i’ve measured the lipo, and some cells went down to 2.7-2.9 battery got really hot, and definitely damaged in the long run… I assume this might work for some cars that don’t require high amps of spoke current to start. Not worth the potential damage to lipo, though

[@MoAvW]

Reason for buffing the battery is the delta from 12-14V of car bat to ~25V (!) of the 6s. I=dV/R so high voltage diff high current, which the 6s could not handle. Next time give the car nothing more then 14V, 12V is ideal.

[@shalotfpv]

6S is over double the 12v a normal car battery is-- I wonder if a bigger (more mah) 3S or 4S battery would crank and wonn't puff

[@chesterlim15]

Curious, was the 4s pack fully charged before you used it, or was it closer to storage voltage?

[@TitanFPV]

Closer to storage voltage.

[@chesterlim15]

@@TitanFPV I see, I think the black box removed from the cable might have saved the battery from puffing since it probably has diodes to prevent the back charging from the alternator.

[@jumpstartfpv]

Did you disconnect the alternator for this?

[@TitanFPV]

Nope.