I think they used to make a gadget that plugs into a cigarette lighter to keep memory alive during a battery swap but with some of today's cars shutting off the lighter socket for some reason it may not work without some work.
I wonder if you could make a dongle that would take several 18V power tool batteries and reduce it to 14v. Or the larger 40v power packs. Probably inefficient, but the batteries are always available around the house.
IIRC a Chinese 40v that fits Ryobi was about $60. Buy a couple more & keep them in the trunk, swapped in the usual rotation for your power tools.
Just using the battery at 18v? How many amps can that battery push out? What was the ambient temperature?I don't blindly recommend this but is interesting for sure.
I'm really not sure how many amps but a 5A dewalt battery pack likely has 2500-2600mah 18650s in it that may be able to put out 10-20A and in 2 stacks of parallel sets of 5 batteries that means from 20-40A or so. If you couple a possible 40A charging and starting rate and a car battery that isn't totally 100% dead it makes sense to me as I have a car charger with a 50A starting boost setting that I've used several times over the years to help start a completely dead battery (no solenoid noise at all) but it took a lot longer to start the car with a large V6 vs that example with a 4 cylinder which takes considerably less current most likely.Just using the battery at 18v? How many amps can that battery push out? What was the ambient temperature?
45 deg, 4 cyl car.
Wonder if those battery packs have a load detection circuit that pushes like a battery charger into the car battery?
Say he's done it 25 times without ruining the battery pack.
It's hard to get a straight answer from Noco. So, to make easy on the messenger, i asked what is total battery mAh for 2500a Boost X.. Replied 5000.. a single 21700 wtf? I ordered a triangular shape security screw driver so I can take unit apartThe 1500A NOCO says 35 watt hours, so 35/12v = 2.92 A hrs. That's not many batteries in there.
I took my LiIon jumpstarter apart, because that's what I do! I also was very much surprised that the battery was only something like 3500 mah. I don't recall the voltage. But it was one of those flat cells, not a few 18650's in series or parallel. I guess it is of a chemistry that allows it to put out high amperage, and drain itself quickly.It's hard to get a straight answer from Noco. So, to make easy on the messenger, i asked what is total battery mAh for 2500a Boost X.. Replied 5000.. a single 21700 wtf? I ordered a triangular shape security screw driver so I can take unit apart
It's hard to get a straight answer from Noco. So, to make easy on the messenger, i asked what is total battery mAh for 2500a Boost X.. Replied 5000.. a single 21700 wtf? I ordered a triangular shape security screw driver so I can take unit apart
If the specs are right then likely the manufacturer is within 10% of ratings which often I see they proclaim in the small print somewhere, but who knows as you can make a label easy enough to say anything you want to.I took my Type S 12V Jump Starter apart.
It also claims to be a 8000 mAh portable power bank.
I opened it up to find...
View attachment 18963
View attachment 18964
google pointed me to:
high discharge rate lipo 606080 12V 40C 7500mah lithium ion battery for car jump starter