If that is truly 30,000mah or 30Ah then it is about 360 watts which has more available power than SLA packs. I think there is two things needed... high current capability and enough capacity to sustain cranking long enough to start an engine. Most engines these days start a lot easier than older engines but if you did get a car that has a hard time starting some of these packs may poop out after the pack depletes. a 30Ah pack that is turning an engine that takes 400-500 amps can theoretically maintain cranking for about 6 minutes or so but one thing to consider is that battery packs wear in time and capacity is reduced so half way through the life of the pack your 6 minutes of cranking time may drop to closer to 3 minutes which would have you needing to recharge it after every use. I have a feeling we will see more and more of these lion packs in stores as people will be more impressed by the small size and claims than realizing the actual use of them may not meet up with expectations a few years down the line.
I watched the video and to be honest I noticed two things going on here the first is it seems like the truck wasn't -20C to begin with and was put in I guess a freezer for 2 hours along with the battery pack and there is no way an engine at even 10C can drop to -20C in 2 hours unless you have colder temps than that blowing at the block itself. The second thing I noticed was the sound of it starting sounded like it wasn't cranking anywhere near as fast as normal and it was sounding like just before it started it was starting to slow down cranking speed and that was with less than 15 seconds of use. Now this may be fine if your car starts easily in cold weather the first time. Sometimes my truck won't start the first time I crank it I have to pause for a few seconds and try again and then it starts. I may be a skeptic but if you go on over to amazon.com and start reading the negative reviews you start to get a picture that this pack may be woefully underpowered. These days it is quite easy to flood the internet with fake reviews and to be honest it sort of looks that way on youtube with most of the reviews coming from the company itself (sponsored).
Most cars around here are larger than 2L my truck has a 4.0L V6 in it. Get an older car with a 5.7L motor in it and these jump start packs would have their hands full.I also tested this one recently: http://www.amazon.de/gp/product/B00PGXSJG8/
I got 4600mAh out from the 3s lipo battery!
It is rated for 300A cont. and 600A Peak!
I did a start test with disconnected main battery on my 2L diesel engiene and it started at the first attemt! (the car was sitting over night at 5°C!)
So for me this is the best jupm starter in this class! I can recommend to anyone with a diesel engine!
All the others rated as 200/400A are not suitable for diesel engines!
Also be Aware of the weight of the jump starter - it should be around 450g to have enough lipo power inside to start a diesel engine! (just my findings after testing some different models!)
you are right, but you didn't get the decent housing with the other Features! Maybe useful sometime.... :candle: :rock:
Was the booster battery also at 5C?
if an alternator keeps a cars electrical system running at 14V..
Wonder if a 4S Lipo pack charged up to 14V, would be a stronger option for a starter setup??
200amps @ 14V is clearly stronger than 12ish
Although the cells aren't up to full charge, so this may effect amp current,, hmmm
I didn't read this whole thread but most of it. I live in Canada and it is safe to say that for at least 8 months of the year, none of these products would ever work. The only way they would ever work is if they charged the lead acid battery for long enough that it was able to provide enough power to crank the vehicle. Due to the extreme cold where I live, batteries that start to preform poorly get weeded out on an annual basis. The most common reason people need a boost where I live is because the vehicle is almost always kept in a garage and the vehicle got parked outside too long the block got WAY colder than usual.How well does it work in low temp environments?