Can any one tell me if there is a way to know how many true amp hours are in a portable jump starter.
I know this will vary depending on its size.
I have a son coming back from USA and the unit that I want says 2000A peak 20000mAh
Now to me this is gobberlygook. To travel with it on a plane a lithium battery has to be under 100 watt.
How do I or airport authorities calculate this?
This is the unit Robot or human?
Dave.
I was asked " Is it ignorance or apathy?" I replied "I don't know and I don't care."
1983 RR gone (wish I kept it)
1996 TDI ES.
2003 TD5 HSE
1987 Isuzu County
Dave.
I was asked " Is it ignorance or apathy?" I replied "I don't know and I don't care."
1983 RR gone (wish I kept it)
1996 TDI ES.
2003 TD5 HSE
1987 Isuzu County
They don't. They have a total of 20AH @ a nominal 3.7V. That gets divided by 4 to get a nominal 14.8v (peak of 16.8 but it'll put a float on the car battery sharpish). So realistically 5AH, but then that's also Chinese Amp Hours, or 5AH PMPO.
My power bank here is 26800mAH and the label says 99.16WH.
Why import one when they are cheap as chips here - mine off ebay was a little less than $100.
REMLR 243
2007 Range Rover Sport TDV6
1977 FC 101
1976 Jaguar XJ12C
1973 Haflinger AP700
1971 Jaguar V12 E-Type Series 3 Roadster
1957 Series 1 88"
1957 Series 1 88" Station Wagon
Right there on the specifications page: Capacity: 20000mAh (73.2Wh)
So they've used a nominal voltage of 3.66V
The way to know how many "true" amp hours are in the device is to do a couple of calculated discharge tests. I have a specific rig built to do that with a controllable load, a couple of GPIB volt meters and a calibrated shunt. But that's probably a bit more than you need.
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