Monoprice has an 800amp option for $48.
https://www.monoprice.com/product?p_id=39603
Went to run my 9000 W genset and the battery was dead. Got the Audew that had been sitting four months. Read 98%.
Fired the gen right up and still had 98%.
Good stuff.
Firt time I put my NOCO GB40 to task today. Sons GF battery was dead.
Powered up at about 75% after ~9 months in the trunk since I last charged it.
Started up her little 4 cylinder, no problem. Very handy.
"No free man shall ever be debarred the use of arms." - Thomas Jefferson, Virginia Constitution, Draft 1, 1776
And today it saved me a bunch of hassle and drama.
On my Subaru, I leave the headlights on auto. They stay on until I remove the ignition key. If I turn off the engine, but leave the key in the switch, the headlights are still on. Like today when I went through the McDonalds drive thru and ate in the parking lot. When I went to leave, I got the dreaded click. I slapped my fore head because my brother had told me that could happen.
I got out, popped the trunk and hood, hooked this thing up and within 5 minutes I was on my way.
It was still at 100% before I jumped the car and was at 82% afterward. I'm charging it to full and ordering a couple more for the other cars.
NOCO GB40. I *think* I charged it 11/2020. Not sure though. Checked it today and 3 bars... so between 50-74%.