Comments by "David Elliott" (@davidelliott5843) on "Which Car Jump Starter Is Best? Let's find out! NOCO GB40 vs Duracell vs Audew" video.

  1. LiFePo4 won’t work well below 5 degrees C. It’s no problem just don’t leave it in the car overnight. The big advantage is the low self drain(10% per year). I had a 4 Amp Hour JMT that started a 1200cc bike just as well as a 14 AH AGM lead acid. In cold weather you apply a load to warm the battery. It then delivers full current.
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  2. Check out the cable sizes at https://www.wiringproducts.com/battery-cable. The jumper cables with these batteries are very much on the side of not big enough.
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  3. My car has a 55AH lead acid battery. It's got carry handles it's so HEAVY. My 1200cc BMW motorbike had a 14AH high spec all singing and dancing lead acid that weighed 10 pounds. I fitted a 4AH LiFePO4 battery to the bike. It weighed 2 pounds and was physically 1/4 of the volume. Yet it turned the engine faster than the lead acid. I put it on the car. Not only did it start the car easily, it also had no problem handling the load of the electric power steering AND the rear window heater. That particular power steering is especially fussy with low system volts. But no problems at all. HOWEVER, LiFePO4 struggles below 5 degrees C (40F approx). It needs a couple of failed starts to warm the battery core. It then works fine, BUT the car's clocks will have reset and some car electronics get uppity when volts go too low. The solution would be a built in heater core within the battery. In cold weather hit heat before turning the starter.
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  4. They usually have protection circuits, but taking a lithium ion below it's minimum will brick it and ordinary lead acid won't take very kindly to it.
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