CORRECT - never just try to jump and leave -
Like Endy Stated - leave the connection connected for min of 20 min -
Go walk away - they try to start still connected.
Make sure you have solid connection -
90% of jumpers cables are junk.
Go get a new set if close by.
Test jump connection turning on key - to see if Head light is bright - turn key off - walk away.
There's 2 points to jump charge-
1. At the battery-
2. Starter Relay - if seat is not able to be removed.